Answer:
x = 9
Step-by-step explanation:
20 = 10 +2(x - 4)
10 + 2(x -4) = 20 {Use distributive property}
10 + 2x - 2*4 = 20
10 + 2x - 8 = 20 {add like terms}
2x + 2 = 20
2x = 20 - 2
2x = 18
x = 18/2
x = 9
The temperature is -1°F. If the temperature rises 10° F, what will the new temperature be?
[please it’s timed]
I assume it'd be 9°F.
-1 + 10 = 9
Hope this helps!
Equations
6) 2x + 3y = -1
3x + 4y = -4
Answer:
x = -8
y = 5
Step-by-step explanation:
2x = -3y-1
x = (-3y-1)/2
3x + 4y = -4
3[(-3y-1)/2]+4y = -4
(-9y-3/2)+4y = -4 (x2 all)
-9y-3+8y = -8
-9y+8y = -8+3
-y = -5
y = 5
3x+4.5 = -4
3x+20 = -4
3x = -24
x = -8
checking:
2.(-8)+3.5 = -1
-16+15 = -1 (checked)
What is the x-coordinate of the point of intersection for the two lines below?
(2x + y = -9
(2x - 5y =-3
Answer:
From the graph, it is clear that the point of intersection is:
(x, y) = (-4, -1)And the x-coordinate of the point of intersection for the two lines is:
x = -4Step-by-step explanation:
As we know that the solution of the system of equations is the point of intersection. Let us solve it.Given the system of equations
[tex]\begin{bmatrix}2x+y=-9\\ 2x-5y=-3\end{bmatrix}[/tex]
solving the system of equations
subtracting 2x+y = -9 from 2x-5y = -3
[tex]2x-5y=-3[/tex]
[tex]-[/tex]
[tex]\underline{2x+y=-9}[/tex]
[tex]-6y=6[/tex]
so
[tex]\begin{bmatrix}2x+y=-9\\ -6y=6\end{bmatrix}[/tex]
solving for y
[tex]-6y=6[/tex]
Divide both sides by -6
[tex]\frac{-6y}{-6}=\frac{6}{-6}[/tex]
[tex]y=-1[/tex]
[tex]\mathrm{For\:}2x+y=-9\mathrm{\:plug\:in\:}y=-1[/tex]
[tex]2x-1=-9[/tex]
[tex]2x=-8[/tex]
Divide both sides by 2
[tex]\frac{2x}{2}=\frac{-8}{2}[/tex]
[tex]x=-4[/tex]
Thus, the x-coordinate of the point of intersection for the two lines below will be:
[tex]x=-4[/tex]
Also, the graph is attached.
From the graph, it is clear that the point of intersection is:
(x, y) = (-4, -1)And the x-coordinate of the point of intersection for the two lines is:
x = -4How many terms are in the following algebraic expression?
5x + 3y – 10
0
1
2
3
4
5
Help plz guys
Answer:
There are 3 terms
Step-by-step explanation:
5x, 3y, and 10 are terms so there are three. Terms a separated by signs (like + or -)
factorize x^2+3x-ax-3a
Answer:
=−ax+x2−3a+3x
Step-by-step explanation:
Nasreen was babysitting her cousin on Saturday.
She brought him to the park and spent $4.25 at
the ice cream truck. If she was paid $30.00 for
babysitting, how much did Nasreen profit for the
afternoon?
Answer:
$25.75
Step-by-step explanation:
$30.00 - $4.25 = $25.75
The table shows the linear relationship between the number of hours Francis worked, x, and
the amount of money Francis earned, y.
Answer: 14 per hour
Step-by-step explanation: divide amount earned by hours worked
What is the measure of ZRST?
Answer: 131
Step-by-step explanation: that one is good
Solve this equation
бу – 14 = 22
y =
Answer:
Let's solve your equation step-by-step.6y−14=22Step 1: Add 14 to both sides.6y−14+14=22+146y=36Step 2: Divide both sides by 6.6y6=366y=6Answer:✍️y=6100 POINTS
A plant is already 15.00 meters tall, and it will grow 6 centimeters every month. The plant's height, H (in meters), after x months is given by the following. =H+15.000.06x What is the plant's height after 15 months?
1)
Which decimal represents the portion that is NOT shaded?
A)
0.003
B)
0.03
0
0.3
D)
3.0
Answer:
D) 3.0
Hope this helped
PLZ HELP DUE IN 30 minutes
For the cube first we find the surface on one side which is 3x3=9ft^2
we have 6 sides 9x6=54ft^2
For the pyramid first we find the surface of the base which is 15x15=225in^2
next we find the surface of the sides which is 7*15/2=52.5in^2 52.5*4=210in^2
210+225=435in^2
Answer:
435 inches for pyramid 54ft for cube
Step-by-step explanation:
52.5 x 4=210
15 x 15 = 225
cube 3 x 3 ft equals 9 feet repeat for all 6 faces u get 54ft
Solve for m: -8 = m/-10 - 16
Answer:
m = -80
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Step-by-step explanation:
Step 1: Define
-8 = m/-10 - 16
Step 2: Solve for m
Add 16 to both sides: 8 = m/-10Multiply -10 on both sides: -80 = mRewrite: m = -80Answer:
We have this equation:
-8 = m/-10 -1
We can add 8 at both sides:
-8 + 8 = m/-10 -16 + 8
0 = m/-10 -8
Now, we can multiply -8 by -10 with the objective of having the same denominator (-10) in all numbers:
0 = m/-10 - 8*(-10)/-10
0 = m/-10 +80/-10
Now, we can delete all denominators
0 = m + 80
And we can say m = -80
Now, we can replace it to see if it's true:
-80/-10 - 16 = -8, so we know that's true
-80/-10 -16 = 8 - 16 = -8 ..
I need help with this, I can't figure it out.
Answer:
- 4, 13, - 21, 47
Step-by-step explanation:
Using the recursive rule and a₁ = - 4 , then
a₂ = - 2a₁ + 5 = - 2(- 4) + 5 = 8 + 5 = 13
a₃ = - 2a₂ + 5 = - 2(13) + 5 = - 26 + 5 = - 21
a₄ = - 2a₃ + 5 = - 2(- 21) + 5 = 42 + 5 = 47
Thus the first 4 terms are - 4, 13, - 21, 47
Find the measure of the indicated angle:
A) 68°
C) 45°
B) 47°
D) 940
Please help I don’t know how to do this
Answer:
x = 50°
Step-by-step explanation:
According to exterior angle property of a traingle , measure of exterior angle is equal to sum of it's two interior angles of the triangle. So,
[tex]x = 15 + 35 = 50[/tex]
PLLSSS HELP ASAP!!!!!!!!
Given the e(t) = 1.8t + 25
How many feet had Evie ran after 14 seconds? Round to the nearest whole second.
Solve the system.
y+5x=1
5y-x=5
The solution is ___
Explain your choice of method.
Answer:
(0, 1)
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightEquality Properties
Algebra I
Solving systems of equations using substitution/eliminationStep-by-step explanation:
Step 1: Define Systems
y + 5x = 1
5y - x = 5
Step 2: Rewrite Systems
y + 5x = 1
Subtract 5x on both sides: y = 1 - 5xStep 3: Redefine Systems
y = 1 - 5x
5y - x = 5
Step 4: Solve for x
Substitution
Substitution in y: 5(1 - 5x) - x = 5Distribute 5: 5 - 25x - x = 5Combine like terms: 5 - 26x = 5Isolate x term: -26x = 0Isolate x: x = 0Step 5: Solve for y
Define equation: 5y - x = 5Substitute in x: 5y - 0 = 5Subtract: 5y = 5Isolate y: y = 1Find the width of the Brady river.
Answer:I think its 5miles
Step-by-step explanation:
hope this helps!
On a recent day, 8 euros were worth $9 and 24 euros were worth $27. Enter an equation of the form y = kx to show the relationship between the number of euros and the value in dollars. Let y be the value in dollars and x be the number of euros.
Answer:
y=1.125x
Step-by-step explanation:
9/8 is the ratio
so, I would do 9/8 which is 1.125. so, one euro is worth 1.125 dollar
y(dollars)=1.125x(euros)
TEST
27 dollars=1.125 • 24
done
The drawing plan for an art studio shows a rectangle that is 19.2 inches by 8 inches. The scale in the plan is 4 in.: 5 ft. Find the length and width of the actual studio. Then find the area of the actual studio.
23.82600 in standard form
Answer:
23.826
Step-by-step explanation:
To write a linear expression in standard form, rearrange the terms in alphabetical order.
Triangle PQR is similar to triangle VST with a scale factor of 2:5, find the value of x. (show your work for credit) * M (15 Points) T 1 1 1 R Q x 45 28 P V S 30
Answer:
its is 15
Step-by-step explanation:
trust me plz plz
Answer: it’s a decimal
Step-by-step explanation:
What is the slope of the line.
Answer:
1/3
Step-by-step explanation:
I have a certain way of doing this, I will start from the Y-intercept, let's say its (0, 2), then, if the next point is (3, 4) i will count up 1, to get to point 3 on the graph, then count left/right to point 4. Thus making my slope 1/2.
Hope that made sense!
What is the value of n in the equation 1/2 (n-4)-3=3-(2n+3)?
n = 0
n = 2
n = 4
n = 6
Answer:
Solve for
n
by simplifying both sides of the equation, then isolating the variable.
n
=
2
Step-by-step explanation:
At a restaurant 28 guests ordered a dessert, and 42 quests did not order a dessert. What
percentage of the guests at the restaurant ordered a dessert?
PLEASE ANSWERRRRRRRR!!!
What is the value of, when x^2+5=21?
Have a good day!!
Answer:
x= 4 or -4
Step-by-step explanation:
take the root of both sides then solve
hope this helped♥
helppp
algebraaaaa what is sum of polynomials
Answer:
3x^2+6x+4
Step-by-step explanation:
6x+7+x^2+2x^2-3
3x^2+(7-3)+6x
3x^2+6x+4
convert 3 4/5 into a improper fraction with steps please
Answer:
Step-by-step explanation:
((3×5)+4)/5=
19/5
The improper fraction is 19/5.
We have to convert [tex]3 \dfrac{4}{5}[/tex] it into an improper fraction.
To convert into an improper fraction calculation must be done in a single unit following all the steps given below.
Step1; Write the fraction into simple fractions,[tex]= \dfrac{3 \times 5 + 4}{5}[/tex]
Step2; Solve the following equation.[tex]=\dfrac{15+4}{5}\\\\=\dfrac{19}{5}[/tex]
Hence, The improper fraction is 19/5.
To know more about Fractions click the link given below.
https://brainly.com/question/21449807