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Xelga [282]
3 years ago
8

I will mark you brainiest if you can answer this

Mathematics
1 answer:
Vika [28.1K]3 years ago
7 0

Answer:

D

Step-by-step explanation:

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Kathy starts with a number. She adds 3 to her number then doubles the result. Finally she subtract 7. If she ended with 9 what n
Ivahew [28]

if she has 9, add 7. you have 16. divide it by half, 8. subtract 3 and you get 5.

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Please help me with math please
kari74 [83]

Step-by-step explanation:

I'm thinking about $35 hope this helps ! :-)

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1) What is the solution to the equation?
ivanzaharov [21]

Step-by-step explanation:

1. -4

2. -3.25

3. 4

4. -2

5. Couldn't figure out this one

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A section of a rectangle is shaded. The area of the shaded section is 63 square units. What is the value of x?
ella [17]

Answer:

x=11  

Step-by-step explanation:

We have been given a graph of a rectangle. The area of the shaded section is 63 square units. We are asked to find the value of x.

We can see from our given graph that shaded section forms a trapezoid, so we will use area of trapezoid formula to find the value of x.

\text{Area of trapezoid}=\frac{(a+b)}{2}\times h, where, a and b represents the parallel sides of trapezoid and h represents height of trapezoid.

Upon substituting our given values in above formula we will get,

63=\frac{7+x}{2}\times 7

63=(7+x)*3.5

Upon dividing both sides of our equation by 3.5 we will get,

\frac{63}{3.5}=\frac{(7+x)*3.5}{3.5}

18=7+x

Let us subtract 7 from both sides of our equation.

18-7=7-7+x

11=x

Therefore, the value of x is 11 units.

5 0
3 years ago
PLEASE HELP!!! I really need help with this.
kenny6666 [7]

Answer:

M.  2.5n - (-8.2) = 26. 7

to find n transpose

2.5n + 8.2 = 26. 7

2.5n = 26. 7 - 8.2

2.5n = 18.5

n = 18.5 ÷ 2.5

n = 7.4

L.  \frac{7a + 1}{2} = 18

7a + 1 = 18 ×2

7a + 1 = 36

7a = 36 - 1

7a = 35

a = 35 ÷ 7

a = 5

N.     \frac{2}{5} b + 1 = -11

\frac{2}{5} b   = -11 -1

\frac{2}{5} b   = -12

b = -12 - \frac{5}{2}

b = 20

H.   5 - \frac{9}{2} d = 32

- \frac{9}{2} d = 32 - 5

- \frac{9}{2} d = 27

d =  27 + \frac{2}{9}

d = 6

8 0
3 years ago
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