7.
Which expression is equivalent to 2r(2.5s + 10) - 3(r + 4) + s(r - 1)?
A. 6rs + 23r - 13
B
6rs + 17r - 13
С
6rs + 23r + S + 12
D
6rs + 17r - S - 12
I WILL MARK BRAINLIEST, NO FAKE ANSWERS
Heather wants to make a 36% acid solution.
She has already poured 3 fl. oz. of a 72%
acid solution into a beaker. How many fl.
oz. of a 9% acid solution must she add to
this to create the desired mixture?
Answer:
.72x + .27 = .36(x + 3)
Find the distance between the pair of points.
(19,−8) and (−14,−23)
Answer:
36.25 units
Step-by-step explanation:
Hi there!
[tex]d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}[/tex] where two endpoints are [tex](x_1,y_1)[/tex] and [tex](x_2,y_2)[/tex]
Plug in the given points (19,−8) and (−14,−23):
[tex]d=\sqrt{(19-(-14))^2+(-8-(-23))^2}\\d=\sqrt{(19+14)^2+(-8+23)^2}\\d=\sqrt{(33)^2+(15)^2}\\d=\sqrt{1089+225}\\d=\sqrt{1314}\\d=36.25[/tex]
Therefore, the distance between the points is approximately 36.25 units.
I hope this helps!
Answer:36.25
Step-by-step explanation:distance between (x1, y1) and (x2,y2) is square root of (x2-x1)^2 + (y2-y1)^2. think of graph the distance between two points is the hypotenuse of a right angle triangle where the height is the difference of y and base is the difference of x
= square root of (19+14)^2 +(-23+8)^2= 36.25
Plot the points (-3, 4) (4, 4) on the coordinate plane below.
What is the distance between these two points.
Answer:
the distance is 7 units
Step-by-step explanation:
pls mark me brainliest :))
You have 8/12
of a blueberry pie left over from dinner. If you sent 1/5 of the leftover
blueberry pie home with your guests, how much of the blueberry pie do you have left in the dish?
Answer:
8/12-1/5=7/15 reduce 8/12 to 2/3
Express the ratio as a fraction in simplest form. 10 yards to 10 feet
Answer:
30
Step-by-step explanation:
3 feet per yard, therefore 10 yards= 30 feet
Hshshjsjsjsjsjsjjsjs
Answer:
3 ÷ 8
Step-by-step explanation:
1. A fraction has two parts: a numerator and a denominator. The numerator is the dividend (the number that is to be divided by the divisor), and the denominator is the divisor (the number that is divided into the dividend).
2. Given the information above, we know that 3 is the numerator, and 8 is the denominator. This means 3 ÷ 8 = 3/8.
6. How high must a crate be in order to hold 120 cubic meters if it has a base area of 24 square meters?
Answer:
height = 5 m
Step-by-step explanation:
The volume (V) of a cuboid is calculated as
V = Ah ( A is area of base and h the height )
Here V = 120 and A = 24 , then
24h = 120 ( divide both sides by 24 )
h = 5
The height of the crate is 5 m
Write the equation of the line that passes through the points (3,1) and (-2,6)
[tex]slope = y2 - y1 \div x2 - x1[/tex]
[tex]6 - 1 \div - 2 - 3[/tex]
[tex]5 \div - 5 [/tex]
[tex] - 1[/tex]
[tex]y = mx + c[/tex]
[tex]1 = - 1 \times 3 + c[/tex]
[tex]1 = - 3 + c[/tex]
[tex]1 + 3 = c[/tex]
[tex]c = 4[/tex]
[tex]y = - 1x + 4[/tex]
[tex]y = - x + 4[/tex]
What is the volume of this cylinder?
6 ft
12ft
Solve 5/(r-9)=8/(r+5)
Answer:
r = 32 1/3
Step-by-step explanation:
5/(r-9) = 8/(r+5)
cross multiply:
5 x (r + 5) = 8 x ( r - 9)
5r + 25 = 8r - 72
Add 72 to both sides:
5r + 97 = 8r
Subtract 5r from both sides
97 = 3r
Divide both sides by 3
r = 32 1/3
-Chetan K
Answer:
r = 32 1/3 or 97/3
Step-by-step explanation:
Step 1: Cross-multiply.
[tex]5*(r+5)=8*(r-9)[/tex] [tex]5r + 25 = 8r - 72[/tex]Step 2: Subtract 8r from both sides.
[tex]5r + 25 - 8r = 8r - 72 - 8r[/tex] [tex]-3r +25=-72[/tex]Step 3: Subtract 25 from both sides.
[tex]-3r + 25 - 25 = -72 - 25[/tex] [tex]-3r = -97[/tex]Step 4: Divide both sides by -3.
[tex]\frac{-3r}{-3}=\frac{-97}{-3}[/tex] [tex]r=\frac{97}{3}[/tex] [tex]r = 32\frac{1}{3}[/tex]Therefore, r = 32 1/3 or 97/3.
Please solve this problem... I will mark you brainliest
Answer:
First find x
70-x=4x
-x-4x=-70
-5x=-70
x=14
Angle BEC = 70°-x
=70-14
=56°
Angle AEB = 180- 56
= 124°
Angle DEA =4x
= 4× 14
= 56°
Angle CED = 180-56
=124°
an arrow is horizontally projected from the top of a tower with an initial velocity of 18m/s if it reaches the ground 7s later, calculate the height of the tower (take g=10m/s²)
Answer:
x[f]=at^2/2+v[i]t+x[i]
Brackets dennote a subscript.
You're given x[f], a, t,and v[i]. You can just plug in their values into the formula and solve for x[i]. The horizontal velocity is irrelevant, the height of the tower is the initial position of the arrow, and final position is gonna be when it reaches the ground,or 0.
Which one is the larger average rate, -3.142 or -0.5?
Answer:
-0.5 is the larger average rate
Step-by-step explanation:
-3.142 is less than -0.5
Write 90 mm2 in cm2
I still don’t know it
Answer:
90mm^2= 90×10^-2 = 0.9 cm^2
Can you subtract 8 tenths from 1 tenth?
Answer:
Not if you want it to be a positive number. You can but it will be a negative.
Step-by-step explanation:
What are the values of t and u?
Answer:
t=44°
U=92°
Step-by-step explanation:
V=W=44°
U=180-(44×2):92°
please help im tired and i don't wanna fail it's important
Options:
A) there are no points located on the x - axis
B) B
C) C
D) D
E) E
Answer:
D
Step-by-step explanation:
The x-axis is the horizontal line. Therefore D is directly on the line, making it on the x axis.
100 points and brainliest to the first correct answer
I've done the work but I need to know what my new coordinates will be
Here's the question
Use the mapping (x+3, y-5), for the transformation of triangle ABC with vertices A(-2, -4), B(0, 0), and C(1, -3), find the coordinates of the new triangle A’B’C’ . You must show all your work.
And then here is the answer:
You’re going to go left side three points and down five for every point on the graph (ABC) and once you do that label the ABC marks with an apostrophe like so; A’B’C’ for every time you change places
Answer:
A'(1, -9), B'(3, -5), C'(4, -8)Step-by-step explanation:
Use the given rule and find the coordinates as follows:
(x, y) → (x + 3, y - 5)A(-2, -4) → A'(-2 + 3, -4 - 5) = A'(1, -9)B(0, 0) → B'(0 + 3, 0 - 5) = B'(3, -5)C(1, -3) → C'(1 + 3, -3 - 5) = C'(4, - 8)The points are plotted, see the attached.
Answer:
Before I start, wouldn't you go right three times since it's x + 3 not x - 3. Id.k maybe I'm just slow.
Anyways, take your current points which are A(-2,-4), B(0,0), and C(1,-3) and apply the new mapping rule to them. For example: (-2 + 3, -4 -5), and that will give you A' (1,-9). If you do the same to the other two, you'd have B' (3,-5) and C' (4,-8).
I graphed A, B, C, and A', B', C' above for you.⤴⤴
Hope the graph makes sense, good luck :)
A sum of money is shared amongst three friends, Shai, Toni and Mara in the ratio 6:5:9 respectively. If Toni received $160, how much money did Shai and Mara receive? HELLLLLLLLPPPPPPP
Answer:
$192 and $288Step-by-step explanation:
The ratio given:
Shai : Toni : Mara = 6 : 5 : 9Toni receives $160, which is 5 portions.
Each portion is:
$160/5 = $32Shai gets:
6*$32 = $192Mara receives:
9*$32 = $288Step-by-step explanation:
It is given
4x+3y=24
We can also write it as
3y=24−4x
y=324−4x
Substituting x=0 in the given equation
y=324−4(0)
So we get
y=324
By division
y=8
Substituting x=3 in the given equation
y=324−4(3)
So we get
y=312
BY division
y=4
You are paid $82.50 for 7 1/2 hours of work. What is your rate of pay
Answer:
$11 per hour
Step-by-step explanation:
Answer:
$11 per hour
I divided 82.5 by 7.5 and got 11.
Sam completed the square for the quadratic equation y=1/2x^2−2x+3 in order to determine the minimum value of the equation, as shown.
Answer:
[tex](2,1)[/tex]
Step-by-step explanation:
You can just use the formula [tex]x=-\frac{b}{2a}[/tex]:
[tex]y=ax^2+bx+c[/tex]
[tex]y=\frac{1}{2}x^2-2x+3[/tex]
[tex]x=-\frac{-2}{2(\frac{1}{2})}=\frac{2}{1}=2[/tex]
[tex]y=\frac{1}{2}(2)^2-2(2)+3=\frac{1}{2}(4)-4+3=2-4+3=-2+3=1[/tex]
Therefore, the minimum value of the equation is [tex](2,1)[/tex]
will mark as brainliest plz help
Answer:
cccccccccccccccccccccccc
The sequence 2, 9, 20, 35, … is illustrated in the art below. What is the 50th term of this sequence?
Answer:
Answer:
345 is the answer
Step-by-step explanation:
use the nth term sequence and you get 7n-5 just substitute 50 and you get that hope I helped!
(-7x) + 5
x= -8
Evaluate the expression
Answer:
61
Step-by-step explanation:
(-7x)+5
Let x = -8
-7*(-8) +5
56+5
61
Answer:
61
Step-by-step explanation:
Here you are just substituting for x.
Since x = -8 we just plug that into the expression.
-7x + 5
-7(-8) + 5
56 + 5
= 61
Angles A and B are supplementary. If mA = 67, find mB.
Pleas show work!
Answer:
mB = 113 degrees
Step-by-step explanation:
180 - 67 = 113
Answer:
mB=113
Step-by-step explanation:
mA=67
Triangles are 180 with all angles added together.
To find mB subtract mA with 180.
180 - 67 = 113
mB=113
How do animals get nitrogen?
by eating other organisms
from the air
by absorbing the sun
through their skin
Answer:
By eating plants or other animals that contain nitrogen
Trigonometric identities: Performance task
#1
[tex]\\ \sf\longmapsto (1+cosx)(1-cosx)[/tex]
[tex]\\ \sf\longmapsto 1-cos^2x[/tex]
[tex]\\ \sf\longmapsto sin^2x[/tex]
#2
[tex]\\ \sf\longmapsto \dfrac{1}{cot^2x}-\dfrac{1}{cos^2x}[/tex]
[tex]\\ \sf\longmapsto tan^2x-sec^2x[/tex]
[tex]\\ \sf\longmapsto 1[/tex]
Follow the steps in purple to evaluate:
4
+
9
To add or subtract fractions, their denominators
must be the same. We can get a common
denominator by multiplying the second fraction
by 3/3.
6
-
(-}).
What number belongs in the green box?
Enter