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3 years ago

Please i needhelp

2 answers:

8 0

Well 60% of the school is girls so 40% must be boys.
50% of girls walk so 50% of 60% or 30%(0.6*0.5) of the school must walk
20% of boys walk so 20% of 40% or 8%(0.4*0.2) also walk
Thus 30%+8%=38%

Liula [17]3 years ago

3 0

Answer:

70%

Step-by-step explanation:

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If mLABC = (2x + 4)º, m_DEF= (3x – 5)°, and ABC and

Harrizon [31]

Answer:

-5x-1

Step-by-step explanation:

4 0

3 years ago

What is the exact area of a circle with a diameter of 18 feet

marin [14]

A = π r^2
A = 9^2 <span>π
</span>A = 81<span>π

if using </span>π = 3.14 then

A = 3.14 x 81 = 254.47 ft^2

answer: 81π ft^2 or 254.47 ft^2

hope that helps

6 0

3 years ago

Seven times a number plus the number is 24. what is the number

katrin2010 [14]

Answer:

x=3 is the number

Step-by-step explanation:

Suppose number be "x".

Equation will be

7x + x = 24

8x = 24

x = 24/8

x = 3

5 0

3 years ago

Read 2 more answers

Which system of equations has exactly one solution?

tester [92]

Answer: Most of them cross each other once so I am not sure which one is the answer (sorry)

Step-by-step explanation:

x+y=7 is parallel to 3x+3y=3 and -6x-6y=3

3x+y=-1 and 6x+2y=-2 have infinite solutions togther (both are on top of each other)

The rest of the ways cross each other once

8 0

2 years ago

f(x) = 500(1.05)x What was the average rate of change of the value of Sophia's investment from the second year to the fourth yea

hjlf

$\bf slope = {{ m}}= \cfrac{rise}{run} \implies 
\cfrac{{{ f(x_2)}}-{{ f(x_1)}}}{{{ x_2}}-{{ x_1}}}\impliedby 
\begin{array}{llll}
average\ rate\\
of\ change
\end{array}\\\\
-------------------------------\\\\
f(x)=500(1.05)^x \qquad 
\begin{cases}
x_1=2\\
x_2=4
\end{cases}\implies \cfrac{f(4)-f(2)}{4-2}
\\\\\\
\cfrac{[500(1.05)^4]~-~[500(1.05)^2]}{4-2}\implies \cfrac{56.503125}{2}\implies 28.2515625$

6 0

3 years ago