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3 years ago

Please help me with this!

Mathematics

2 answers:

Arada [10]3 years ago

5 0

A perfect square is any number that can be multiplied by its self evenly 4x4 = 16. The answer is D.

stellarik [79]3 years ago

3 0

To form a perfect square, we need to add (b/2)² to the equation.

x² + 16x ⇒ b = 16

$\bigg( \dfrac{b}{2} \bigg)^2 = \bigg( \dfrac{16}{2} \bigg)^2 = \bigg(8 \bigg)^2= 64$

We need to add 64 to the equation.

x² + 16x + 64 = (x+ 8)²

Answer: We need to add 64 to the equation.

You might be interested in

What is the standard form of 80,000 + 5,000 + 700 +8?

DochEvi [55]

80,000 + 5,000 + 700 +8 = 85,708....<span>standard form

hope it helps</span>

3 0

4 years ago

Read 2 more answers

-4 1/2x - 3/7= 1/4<br>find x

DiKsa [7]

- 4(1/2)x - (3/7) = (1/4)
- 4(1/2)x = (1/4) + (3/7)
- (9/2)x = (7+12)/28
-(9/2)x = 19/28
x = (19/28) * 2 / 9
x = (19/14) / 9
x = 19 / (14*9)
x = 19 / 126

7 0

3 years ago

I need the answer to these, to be right, and you got to show the work on how you got the answer because if not I’ll get them wro

alexira [117]

A: $\frac{5}{3} = \frac{N}{12}$
Multiply both sides by 12
Answer: $N = 20$

B: $\frac{7}{2} = \frac{42}{N}$
Multiply both sides by 2, $7 = \frac{84}{N}$
Multiply both sides by N, $7N = 84$
Divide both sides by 7,
Answer: $N=12$

C: $\frac{N}{2}= \frac{50}{N}$
Multiply both sides by 2, $N = \frac{100}{N}$
Multiply both sides by N, $N^{2} = 100$
Simplify,
Answer: $N = 10 , -10$

Hope I helped you!

4 0

3 years ago

Read 2 more answers

Rectangle PQRS has vertices at P-2,5), Q44,5), R(4, -1), and S(-2,-1). What is the area, in square units, of rectangle PQRS? 21

Dennis_Churaev [7]

Answer:

36 square units.

Step-by-step explanation:

Please refer to the provided graph.

So we want to figure out the area of the rectangle. To do so, we simply need to figure out the base and height of the rectangle. We can then multiply them together to acquire the area.

From the graph, we can see that if we find the length of SR and SP, we can use the the base and height, respectively.

Now, we just have to find there lengths. Technically, we could just count. However, I'm going to use the distance formula.

the distance formula is:

$d=\sqrt{(x_2-x_1)^2+(y_2-y_1)^2}$

Find the length of SR:

Point S is (-2,-1) while Point R is (4,-1). Let (-2,-1) be x₁ and y₁ and (4,-1) be x₂ and y₂. Therefore:

$d=\sqrt{(4-(-2))^2+(-1-(-1))^2}\\d=\sqrt{(6^2)+(0)^2} \\d=\sqrt{36}=6$

So, SR is 6.

Now, find the length of SP:

Point S is (-2,-1) while Point P is (-2,5). Let Let (-2,-1) be x₁ and y₁ and (-2,5) be x₂ and y₂. Therefore:

$d=\sqrt{(-2-(-2))^2+(5-(-1))^2}\\d=\sqrt{0^2+6^2}\\ d=\sqrt{36}=6$

Therefore, SP is also 6.

Now, the area for a rectangle is:

$A=bh$

Plug in 6 for the base and 6 for the height:

$A=6(6)\\A=36\text{ units}^2$

5 0

3 years ago

the admission fee for a charity event is 7 dollars for children and 10 dollars for adults the event was attended by 700 people a

ollegr [7]

Given:
$7/child
$10/adult
Total people = 700
Total money = $6,400

First, make two equations.
Let a = # of adults & Let c = # of children.
Let p = total people

1. a+c = 700
2. 10a+7c = 6,400

Then, rearrange the equation to solve for a variable.
c = 700-a

Substitute (700-a) for c, or the # of children in the second equation.
10a+(700-a) = 6400
9a+700 = 6400
9a+700-700 = 6400-700
9a = 5700
9a/9 = 5700/9
a = 633 $\frac{1}{3}$ = # of adults attended

700-633 $\frac{1}{3}$ = c = 66 $\frac{2}{3}$ = # of children attended

4 0

3 years ago