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2 years ago

Match each equation to a step that will help solve the equation.

2 answers:

7 0

A) 5x = 0.4 — 3) Multiple by 1/5

B) x/5 = 8 — 1) Multiple by 5

C) 3 = -x/5 — 2) Multiple by -5

D) 7 = -5x — 4) Multiple by -1/5

Explanation:

A:
5x = 0.4

5x • 1/5 = 0.4 • 1/5

x = 2/25 or 0.08

B:
x/5 = 8

x/5 • 5 = 8 • 5

x = 40

C:
3 = -x/5

3 • -5 = -x/5 • -5

-15 = x

x = -15

D:
7 = -5x

7 • -1/5 = -5x • -1/5

-7/5 = x

x = -7/5 or -1.4

Hope it helps!

soldier1979 [14.2K]2 years ago

5 0

1 and B
2 and C
3 and A
4 and D

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Type the correct answer in the box. Use numerals instead of words. The height of a baseball, in feet, is represented by this exp

Rudiy27

Answer:

31 feet.

Step-by-step explanation:

It is mentioned in the question that

Height of baseball expressed in feet

T = time in seconds

Also

$h= -16t^2+64t+3$

Now the time is 3.5 so put this value to the above equation

h = -16(3.5)^2 + 64(3.5) + 3

= -16(2.25) + 224 + 3

= -196 + 227

= 31

Therefore the height of a baseball is 31 feet and the same is to be considered

7 0

2 years ago

Answers for the 2 boxes please:)

masha68 [24]

Answer:

(5,-5)

Step-by-step explanation:

Eliminate y-term

$(2x + 5x) + ( - 3y + 3y) = 25 + 10 \\ 7x = 35 \\ x = \frac{35}{7} \\ x = 5$

We can eliminate x-term but for this system of equations, eliminating y-term is faster.

Substitute x = 5 in any given equations.

I will choose to substitute in the first equation.

$2x - 3y = 25 \\ 2(5) - 3y = 25 \\ 10 - 3y = 25 \\ 10 - 25 = 3y \\ - 1 5 = 3y \\ 3y = - 15 \\ y = - 5$

Answer Check

Substitute both x-value and y-value in any given equations

$2x - 3y = 25 \\ 2(5) - 3( - 5) = 25 \\ 10 + 15 = 25 \\ 25 = 25$

The equation is true. (It is better to check both the answer for both equation.)

Thus the answer is (5,-5)

6 0

2 years ago

each digit in the division example has been replaced with the same letter throughout (r stand for remainder) the digits used wer

Vilka [71]

Theres not really enough information to work from here. Is there anymore to this problem???

5 0

2 years ago

If 1-cos A=1/2 then find the value of sinA.

Aneli [31]

Step-by-step explanation:

$1 - \cos( \alpha ) = \frac{1}{2} \\ = > \cos( \alpha ) = 1 - \frac{1}{2} = \frac{1}{2} \\ = > \alpha = arccos( \frac{1}{2} ) =60 {}^{ \bullet} = \frac{\pi}{3} \\ then \\ \sin( \frac{\pi}{3} ) = \frac{ \sqrt{3} }{2}$