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Naddika [18.5K]
2 years ago
11

Erica solved the equation -5x - 25 = 78; her work is shown below. Identify the error and were it was made

Mathematics
1 answer:
Nata [24]2 years ago
7 0

Answer:

A

Step-by-step explanation:

It's A because she subtracted a negative and that only make a bigger negative where she should have added

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Prove that the value of the expression: 731^2−631^2 is divisible by 100
Ivanshal [37]

Answer:

Step-by-step explanation:

731² - 631² is the difference of squares.

731² - 631² = (731+631)(731-631) = 1362×100

therefore, 731² - 631² is divisible by 100

7 0
2 years ago
A ball is kicked upward with an initial velocity of 32 feet per second. The ball's height, h (in feet), from the ground is model
stellarik [79]

Answer:

1.        t = 0.995 s

2.       h = 15.92  ft

Step-by-step explanation:

First we have to look at the following formula

Vf = Vo + gt

then we work it to clear what we want

Vo + gt = Vf

gt = Vf - Vo

t = (Vf-Vo)/g

Now we have to complete the formula with the real data

Vo = 32 ft/s      as the statement says

Vf = 0     because when it reaches its maximum point it will stop before starting to lower

g = -32,16 ft/s²        it is a known constant, that we use it with the negative sign because it is in the opposite direction to ours

t = (0 ft/s - 32 ft/s) / -32,16 ft/s²

we solve and ...

t = 0.995 s

Now we will implement this result in the following formula to get the height at that time

h = (Vo - Vf) *t /2

h = (32 ft/s - 0 ft/s) * 0.995 s / 2

h = 32 ft/s * 0.995 s/2

h = 31.84 ft / 2

h = 15.92  ft

4 0
2 years ago
I need help on this question​
wel

Answer:

The attachment is black

Step-by-step explanation:

:/

5 0
3 years ago
if you flip a coin and roll a 6-sided die, what is the probability that you will flip a tails and roll a 2 ?
REY [17]

Answer:

5/12

Step-by-step explanation:

I was on Khan Academy, and it said that the answer is 5/12 by 1/2 times 5/6.

7 0
3 years ago
Triangle ABC is shown below with line DE passing through points D and E: Triangle ABC is shown with point D lying on side BC and
Trava [24]

Answer:

I got "D'E' will be parallel

Step-by-step explanation:


8 0
3 years ago
Read 2 more answers
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