Answers
Answer:
(d) x = (5±√53)/2
Step-by-step explanation:
The given quadratic equation is in standard form, so the coefficients are readily identified. The solution is given by the quadratic formula based on those coefficients.
Quadratic formulaThe solution to the quadratic equation ax² +bx +c = 0 is given by the formula ...
[tex]x=\dfrac{-b\pm\sqrt{b^2-4ac}}{2a}[/tex]
ApplicationThe given equation has coefficients a = 1, b = -5, c = -7, so the solutions given by the formula are ...
[tex]x=\dfrac{-(-5)\pm\sqrt{(-5)^2-4(1)(-7)}}{2(1)}=\dfrac{5\pm\sqrt{25+28}}{2}\\\\\boxed{x=\dfrac{5\pm\sqrt{53}}{2}}[/tex]
Related Questions
5. A boy gets 29 marks out of 50 in his maths ex-
am. What percentage did he score?
Answers
Answer:
58%
Step-by-step explanation:
29 / 50 * 100% = 58 % ( rather pathetic score, huh?)
Answer:
58%
Step-by-step explanation:
the boy gets 29 marks out of 50
Then
He gets 29 × 2 marks out of 50 × 2
Then
He gets 58 marks out of 100
Therefore
He scored 58%
Calculate the ninth term of the sequence:
3, 8, 13, 18, 23, 28, 33, 38, ...
Answers
Answer:
43
Step-by-step explanation:
sequence: +5
∴ninth term of sequence = 38+5
= 43
write an exponential function that includes the following given pair of points.
(-3,16) and (-2,8)
Answers
M=-8
8=-2(-8) +b
8=16+b
B=-8
triangle abc is equal to
triangle pqr, angle p=8X+4,
angle a=5x+16 , and angle
q=10x+2. find angle r
a. 36
b.not enough info
c. 42
d 102
Answers
Answer:
d. 102°
Step-by-step explanation:
We can use the relations ...
corresponding angles in congruent triangles are congruentthe sum of angles in a triangle is 180°to write equations that let us find x and all of the angles in ∆PQR.
Corresponding anglesThe congruence relation ∆ABC ≅ ∆PQR tells us that ∠P = ∠A. Using the given expressions for these angles, we have ...
∠P = ∠A
8x +4 = 5x +16
3x = 12 . . . . . . . . . subtract (5x+4)
x = 4 . . . . . . . . . divide by 3
Then the measure of angle P is ...
∠P = 8x +4 = 8(4) +4 = 36 . . . . . degrees
Other anglesAngle Q in ∆PQR is given as ...
∠Q = 10x +2 = 10(4) +2 = 42 . . . . . degrees
Then the measure of angle R needed to make the total of angles in ∆PQR be 180° is ...
∠R = 180° -36° -42° = 102°
Angle R is 102°.
__
In summary:
x = 4∠P = ∠A = 36°∠Q = ∠B = 42°∠R = ∠C = 102°Name the ordered pair that would be a reflection of (9, 2) over the y axis
Answers
Answer:
(- 9, 2 )
Step-by-step explanation:
under a reflection in the y- axis
a point (x, y ) → (- x, y ) , then
(9, 2 ) → (- 9, 2 )
A particular industrial product is shipped in lots of 20. Testing to determine whether an item is defective is costly, and hence the manufacturer samples his production rather than using a 100 percent inspection plan. A sampling plan constructed to minimize the number of defectives shipped to customers calls for sampling five items from each lot and rejecting the lot if more than one defective is observed. (If rejected, each item in the lot is tested.) If a lot contains four defectives, what is the probability that it will be rejected
Answers
The probability that the sample will be rejected if five items from 1 lot is selected is 26/15504.
Given Industrial product is product in lots of 20. If sample contains more than one defective then the lot will be rejected.
Probability is the chance of happening an event among all the events possible. The probability lies between 0 and 1. The formula of calculating probability is as under:
Probability= number of items/ total items.
Sample from 1 lot =5
Samples in 1 lot=20
Lot will be rejected when 1 sample, 2 sample , 3 sample, 4 sample or all the samples are defective.
Probability that the lot will be rejected=[tex](5C_{2} +5C_{3} +5C_{4} +5C_{5})/20C_{5}[/tex]
=(10+10+5+1)/15504
=26/15504
Hence the probability that lot will be rejected if the lot is rejected if more than one defective is observed is 26/15504.
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Find the value of x:
X
4
10
Answers
Applying the definition of similar triangles, the value of x is determined as: 12.5.
What are Similar Triangles?In a triangle like the one shown above, the line that intersects the two sides of the triangle divides the two sides of the triangle to form similar triangles. Thus, their corresponding sides are proportional to each other.
Therefore, we would have:
(x + 5) / 5 = (10 + 4) / 4
(x + 5) / 5 = 14/4
4(x + 5) = 5(14)
4x + 20 = 70
4x = 70 - 20
4x = 50
x = 50/4
x = 12.5
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Consider the line shown on the graph below. Enter the equation of the line in the form y = mx + b where m is the slope and b is the y-intercept. Enter the equation of the line in the form y=mx + b where m is the slope.
Answers
Hello!
We know the y-intercept (b) is 160. So let's find the slope!
Slope = rise / run
Slope = 120 - 160 / 1 - 0
Slope = -40/1 = -40
Forming the equation :
y = mx + b
y = -40x + 160
∴ The equation of the line in slope-intercept form is y = -40x + 160.
Match each formula on the left with an equivalent formula on the right.
W = X-Y
W = X - //
W = 4 - Y
W = XY
Y
X =W₁ + ½
X = Z(W + Y)
X = WZ+Y
X = // +Y
Answers
The formulas and the equivalent formulas are
W = X - Y X = W +Y
W = X/Z - Y X = Z(W + Y)
W = (X - Y)/Z X = WZ+Y
W = XY X =W/Y
How to match the formulas?To do this, we simply make X the subject of the formula in expressions on the left.
So, we have:
W = X - Y
This gives
X = W + Y
W = X/Z - Y
This gives
X/Z = W + Y
X = Z(W + Y)
W = (X - Y)/Z
This gives
X - Y = WZ
X = WZ + Y
W = XY
This gives
X =W/Y
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Complete question
Match each formula on the left with an equivalent formula on the right.
W = X - Y X =W/Y
W = X/Z - Y X = Z(W + Y)
W = (X - Y)/Z X = WZ+Y
W = XY X = W +Y
a square room has a area of 49 square feet the height of the room is 4 feet. what is the area of one wall
Answers
Answer:
28 ft^2
Step-by-step explanation:
The room is in the shape of a square. That means the base of the room (width and length) will have the same dimensions.
Length x Width = 49 ft^2
Length = Width
Length^2 = 49 ft^2
Length = 7 feet
Width is also 7 feet
The height of the room is 4 feet, plenty for non-humans. One wall area would be (7 ft)*(4 ft) = 28 ft^2
Which is the slope-intercept equation of the line (-2,2) and (0,-4)?
Answers
Answer:
y=3x-4
Step-by-step explanation:
Part B Which value is closest to the product 0.04 × 8.01?
A. 32
B. 3.2
C. 0.032
D. 0.32
Answers
Answer:
D
Step-by-step explanation:
this is because when multipled you get 0.3204 so u round and it becomes 0.320
Answer:
D
Step-by-step explanation:
0.04 x 8.01 = [tex]\dfrac{4}{100} . \dfrac{801}{100}[/tex]
[tex]=\dfrac{3204}{10000}\\\\\\0.3204[/tex]
3x − 12y = −21,
−x + 4y = 7
find x and y intercept
Answers
The y-intercept is (0, 1.75)
A student wants to sell 18 cookies for a fundraiser. She knows that she only has 3 days left to sell her cookies. Write an equation to find out how many cookies she must sell each day to reach her goal.
Answers
Explanation: 18 divided by 3 is 6
Answer:
6 cookies per day.
Step-by-step explanation:
if she is going to sell 18 cookies within 3 days, would divide that problem, (18 divided by 3) which will get you selling 6 cookies per day during that 3-day challenge.
What are the two binomial factors for x2 – 25? (x – 5)(x – 5) (x 5)(x 5) (x – 20)(x 5) (x – 5)(x 5)
Answers
Answer:
(x - 5)(x + 5)
Step-by-step explanation:
x² - 25 ← is a difference of squares and factors in general as
a² - b² = (a - b)(a + b)
x² - 25
= x² - 5²
= (x - 5)(x + 5)
Answer:
Step-by-step explanation:
(x-5) +(x+5)
Translate into an algebraic expression:
How much 50% of sugar syrup can you make if you have x grams of sugar?
(Need Urgent Help)
Answers
Answer:
Que is talking about a syrup which contains 50% of sugar .
Que asked : amount of sugar syrup from X grams of sugar.
Explanation :
if a sugar syrup contains 50% of sugar , that means that the half of the solution contains sugar and half is solvent .
means , 2 × amount of sugar = solution (syrup)
now , we are given x grams of sugar
then , solution can be made with x grams of sugar = 2 × (X grams) = 2X gram of solution or sugar syrup.
.
.
Mark BRAINLIEST!
help me i im not good in math
Answers
Number of shirts = dependent variable
Cost of the purchases = independent variable
Andrei wants to fill a glass tank with marbles, and then fill the remaining space with water.
represents the volume of water Andrei uses (in liters) if he uses marbles.
What is the glass tank's volume?
______________liters
Answers
Answer: the amount of liters that would fill the glass tank's volume can not be found
Step-by-step explanation:
there is not enough information to find out how many liters could fill the glass tanks volume
The required volume of glass tank = Vb +Vw liters
Volume, is defined as the ratio of the mass of object to its density.
Andrei wants to fill a glass tank with marbles, and then fill the remaining space with water.
Volume of pebbles = Vb
Volume of water = Vw
Volume of glass tank = Vg
Vg = Vb + Vw
Thus, the required volume of glass tank is = Vb + Vw liters
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6. (04.05 MC)
Which Inequality matches the graph? (1 point)
-2x+3y>7
2x+3y <7
-3x+2y>7
3x-2y <7
Answers
3x - 2y < 7
=============================================================
Explanation:
The dashed boundary line goes through (1, -2) and (3, 1)
Find the slope of this line using the slope formula.
[tex](x_1,y_1) = (1,-2) \text{ and } (x_2,y_2) = (3,1)\\\\m = \frac{y_{2} - y_{1}}{x_{2} - x_{1}}\\\\m = \frac{1 - (-2)}{3 - 1}\\\\m = \frac{1 + 2}{3 - 1}\\\\m = \frac{3}{2}\\\\[/tex]
The slope is 3/2 indicating we go up 3 and to the right 2.
--------------
Now use the point-slope template so we can determine the equation of the boundary line.
[tex]y - y_1 = m(x - x_1)\\\\y - (-2) = \frac{3}{2}(x - 1)\\\\y + 2 = \frac{3}{2}(x - 1)\\\\2(y+2) = 3(x-1) \ \ \text{ see note1 below}\\\\2y + 4 = 3x - 3\\\\2y - 3x = -3 - 4\\\\-3x+2y = -7\\\\3x-2y = 7 \ \ \text{ see note2 below}\\\\[/tex]
Note1: For this step, I multiplied both sides by 2 to clear out the fraction.
Note2: Multiply both sides by -1 so that the x coefficient is positive
--------------
The key thing to pull away from the previous section is that the boundary line equation is 3x - 2y = 7
The question from here is: "What do we replace the equal sign with?"
We need to pick either < or > since we have a dashed boundary. We won't have an "or equal to" portion.
Let's assume the inequality sign is <
3x - 2y = 7 turns into 3x - 2y < 7
To see if this works, we'll plug in the origin (0,0) to get...
3x - 2y < 7
3(0) - 2(0) < 7
0 < 7
The last inequality above is true, so 3x - 2y < 7 is also true when x = 0 and y = 0. It tells us that the origin is in the shaded region. This matches with what the graph shows.
Therefore, we have confirmed that 3x - 2y < 7 is indeed the case.
You could pick other test points. However the origin is the easiest to work with in my opinion. If the boundary went through the origin, then you'd have to pick another point like (0,1).
If you want to use technology to verify the answer, then Desmos and GeoGebra are two good options to go for. See the screenshots below.
In Angle FGH, the measures of angles F, G, and
H, respectively, are in the ratio 4:4:10. Find
the measure of each angle.
Answers
Answer:
40 40 100°
Step-by-step explanation:
Is that TRIANGLE FGH?
the angles add to 180
180 / ( 4 + 4 + 10 ) = 10
then each angle is 4 x10 4 x 10 and 10 x10
PLEASE HELP I AM REALLY CONFUSED
Answers
Answer:
Step-by-step explanation:
y = 3 (x-1)(x+ 7 ) this graph will intercept the x axis when y = 0
0 = 3 ( x-1)(x+7) so you can see this = 0 when x =1 or when x = -7
these are the x-axis intercepts
the vertex will be right in the middle between the intercepts found above ....... at x = -3
plug this value in to find the y coordinate 3 ( -3-1)(-3+7) = -48
vertex is -3, -48
the axis of symmetry is the value of the x coordinate of the vertex
x = - 3
direction of opening will be upward.....
see attached graph
A boy walks 58 feet up a ramp having a 22.5 degree inclination. how high is he standing from the ground?
Answers
Boy is 22.5 feet high from the ground
The six trigonometric ratios are sine (sin), cosine (cos), tangent (tan), cotangent (cot), cosecant (cosec), and secant (sec). In geometry, trigonometry is a branch of mathematics that deals with the sides and angles of a right-angled triangle. Therefore, trig ratios are evaluated with respect to sides and angles.
The given question can be solved by sin, as value of perpendicular is to be evaluated and height and angle is provided. Let height from the ground be x
sin(22.5°) = x / 58
x = 58sin22.5 = 58(.38258) = 22.5 feet high.
Thus the Boy is 22.5 feet high from the ground.
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a ramp is 17 feet long, rises 8 feet above, and a covers a horizontal distance of 15 feet as showed in the figure. the ratio of to is equal to tan B
Answers
Using relations in a right triangle, it is found that:
The ratio of 8 to 15 is equals to tan B.
What are the relations in a right triangle?The relations in a right triangle are given as follows:
The sine of an angle is given by the length of the opposite side to the angle divided by the length of the hypotenuse.The cosine of an angle is given by the length of the adjacent side to the angle divided by the length of the hypotenuse.The tangent of an angle is given by the length of the opposite side to the angle divided by the length of the adjacent side to the angle.Researching the problem on the internet, we have that:
The side opposite to angle B has a length of 8 feet.The side adjacent to angle B has a length of 15 feet.Hence the tangent of B is:
tan(B) = 8/15.
Which means that:
The ratio of 8 to 15 is equals to tan B.
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Sulin has some $2 and $5 notes. The value of the notes add up to $58. There are 15 more $2 notes than $5 notes. How many $2 notes does Sulin have?
Answers
Answer:
t is number of 2 dollars
f is number of 5 dollars
2t+5f=58
f+15=t
2(f+15)+5f=58
simplify
2f+30+5f=58
simplify
7f+30=58
subtract
7f=28
f=4
substitute
4+15=t
4 five dollars
19 2 dollars
Hope This Helps!!!
Given: BC bisects ZABD
mZABD = 52°
Prove: mABC = 26°
A
D
B
Assemble the proof by dragging tiles to
the Statements and Reasons columns.
Statements Reasons
mZABD = 52
mZABC+ m ZABC = 52
Statements
mZABC=mZCBD
m/ABC+mZC=52
Reasons
BC bisects ZABD
mZABC+mZCBD =
m ZABD
Answers
A bisector is a line that divides a given line or angle into two equal parts or measures. So that the required statements and reasons are given below:
STATEMENT REASONS
1. BC bisects <ABD Given
2. m<ABC = [tex]26^{o}[/tex] Bisection property of an angle
3. 2(m<ABC) = [tex]52^{o}[/tex] Sum of angles of a bisected angle
4. m<ABC = m<CBD Congruent parts of a bisected angle
5. <mABC + m<ABC = [tex]52^{o}[/tex] Sum of an individual angle of a bisected angle
6. m<ABC + m<CBD = [tex]52^{o}[/tex] Sum of angles of a bisected angle
7. m<ABC + m<CBD = m<ABD Sum of the angles of a bisected angle
The above statements and reasons are majorly centered on a bisector, the angles formed due to the bisection of a given angle, and the bisected angle.
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Answer:
1. BC bisects <ABD | Given
2.m<ABD=52 | Given
3.m<ABC = m<CBD | Definition of Bisector
4.m<ABC + m<CBD = m<ABD | Angle Addition Postulate
5.m<ABC + m<CBD =52 | Substitution Property
6.m<ABC + m<ABC =52 | Substitution Propery
7.2(m<ABC)=52 | Addition
8.m<ABC=26 | Division Property
Step-by-step explanation:
Edge 2022
Which equation accurately represents this statement? Select three options. Negative 3 less than 4.9 times a number, x, is the same as 12.8. Negative 3 minus 4.9 x = 12.8 4.9 x minus (negative 3) = 12.8 3 + 4.9 x = 12.8 (4.9 minus 3) x = 12.8 12.8 = 4.9 x + 3
Answers
Equations b,c, and e accurately represent this statement.
What is the equation?A mathematical statement consisting of an equal symbol between two algebraic expressions with the same value is known as an equation.
The three equation accurately represents this statement is;
4.9 x-(-3) = 12.8
3+ 4.9 x = 12.8
12.8 = 4.9 x +3
Hence, equations b,c, and e accurately represent this statement.
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35.149 = 30+5+0.1+ ____ +0.009
how to find the missing sum
Answers
Answer:
0.04
Step-by-step explanation:
30+5+0.1+0.009 is 35.109
35.149 - 35.109= 0.04
35.149 = 30+5+0.1+ ____ +0.009
= 30 + 5 + 0.1 + x + 0.009
= 35.109 + x
x is the unknown value, so what number add to the 35.109 gives 35.149? That's what we're after.
35.149 = 35.109 + x
- 35.109 both side
0.04 = 0 + x
Thus, x = 0.04
(35.109 - 35.109 cancles each other & we get x on its own because 0.04 - 0 gives you 0.04)
Hope this helps!
A 2-column table with 7 rows. The first column is labeled x with entries negative 3, negative 2, negative 1, 0, 1, 2, 3. The second column is labeled f of x with entries 15, 0, 3, 0, negative 3, 0, 15.
Predict which statements are true about the intervals of the continuous function. Check all that apply.
f(x) > 0 over the interval (−, 3).
f(x) ≤ 0 over the interval [0, 2].
f(x) < 0 over the interval (−1, 1).
f(x) > 0 over the interval (–2, 0).
f(x) ≥ 0 over the interval [2, ).
Answers
The statements that are true about the intervals of the continuous function are Options 2, 4 and 5
f(x) ≤ 0 over the interval [0, 2].f(x) > 0 over the interval (–2, 0).f(x) ≥ 0 over the interval [2, ).What is the statement about?Looking at the values given, the intervals which satisfies the condition are known to be:
f(x)<=0 over the interval [0,2]
f(x)>0 over the interval (-2,0)
f(x)>=0 over the interval [2,∞)
Because:
Since the table with x and f(x) values, we have to examine analyze the table and see the each option that is in line with f(x) or not .
Examine the values of x that is from -3 to 3, the f(x) values are both positive and negative . hence f(x)>0 is false over the interval (-∞,3)
Looking at the the interval from 0 to 2, the f(x) values are 0 and negative. Hence, f(x)<=0 over the interval [0,2]
When you look over the interval (-1,1), the f(x) values are said to be both positive and negative and as such, f(x)<0 is false over the interval (-1,1)
When you look at the interval (-2,0) , the f(x) is positive and as such, f(x)>0 over the interval (-2,0)
Looking at the interval [2,∞), f(x) is positive and as such, f(x)>=0 over the interval [2,∞)
Therefore, Option 2, 4 and 5 are correct.
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3. Segment RU is an angle bisector. m/QRU = 70°.
What is mzQRS?
Q
70°
□A 70°
B 140°
C 35°
OD 20°
A
U
S
PLS HELP ME OUT
Answers
Answer:
b - 140
Step-by-step explanation:
an angle bisector divides an angle in half
so
half of the angle is 70
the other half is 70
so
70 + 70 = 140
b is your answer
Answer: B. 140°
Step-by-step explanation:
Hi!
An angle bisector just cuts the angle in half.
Therefore, if one half is 70°, the other half is also 70°!
To find the measure of the angle just add them!
70° + 70° = ?
= 140°
So, your answer is B. 140°
Hope this helps and have a great day!
if another line is perpendicular to the line shown on the graph, what must be its slope
Answers
It's B
Slope is negative, the other must be positive due to m1 x m2 = - 1
m1 = -2/5
The diagram shows a gradient of -2/5. So, the
reciprocal of this valve to make - 1 is 5/2 (which is the - 2/5 flipped upside down, but positive)
-2/5 x 5/2 = - 10/10 (or - 1)
Thus, the perpendicular line to this has a gradient of 5/2.
Hope this helps!