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Advocard [28]
4 years ago
8

Help for number 7 please!

Mathematics
1 answer:
Hatshy [7]4 years ago
6 0
The answer to #7 is mentally
You might be interested in
Which shows how the distributive property can be used to evaluate 7x8 4/5?
Yuri [45]

Answer:

61 3/5

Step-by-step explanation:

we realize that 8 4/5 can be written as [8 + (4/5)]

hence 7 x 8 4/5

= 7 x [8 + (4/5)]

= 7 [8 + (4/5)]   (use the distributive property, see attached for reference)

= 7(8) + 7(4/5)

= 56 + 28/5  (convert 28/5 into mixed fraction)

= 56 + 5 3/5

= 61 3/5 (answer)

5 0
3 years ago
Read 2 more answers
WILL MARK BRAINLIEST
Ivanshal [37]

Answer:

27

Step-by-step explanation:

First you need to find x.

It is shown that DE=EF, so we can use this.

5x-3=3x+7

5x=3x+10

2x=10

x=5

Then, you plug in the value of the variable and solve.

6(5)-3

30-3

27 = DF

8 0
3 years ago
Read 2 more answers
Find the area round to two decimal places as needed
Mademuasel [1]

To find the area of an obtuse triangle you have to multiply the base of the triangle by the vertical height and divide the result by 2 following the formula:

A=\frac{b\cdot h}{2}

The base of the triangle is b= 7 miles and the height is h= 8 miles, using these lengths calculate the area as follows:

\begin{gathered} A=\frac{7\cdot8}{2} \\ A=\frac{56}{2} \\ A=28mi^2 \end{gathered}

The area of the triangle is 28 square miles.

3 0
1 year ago
Type the correct answer in the box. Use numerals instead of words. If necessary, use / for the fraction bar.
Sophie [7]

since the equation is c=9.5t, Sanjay paid c=9.5 x 14 shirts he bought. which =$133

6 0
4 years ago
Factor over the complex numbers: 36x2 + 9.
ludmilkaskok [199]

36x^2+9=(6x)^2-(-9)=(6x)^2-(-3^2)\\\\=(6x)^2-(3i)^2=(6x-3i)(6x+3i)\\\\\text{Used:}\\a^2-b^2=(a-b)(a+b)\\\\i^2=-1

4 0
3 years ago
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