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riadik2000 [5.3K]
3 years ago
11

I need an answer pretty quickly.

Mathematics
1 answer:
steposvetlana [31]3 years ago
4 0

Answer:

I think it would be option 1

Step-by-step explanation:

Hope this is right and helpful

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What is the solution of 15=-4+z/3
lana [24]
15=-4+z/3

+4 +15 = +4 -4 +z/3
cancels the 4 on the right side

19 = z/3

3 x 19 = z/3 x 3
cancels 3 on the right side

I think the answer is z = 57
4 0
3 years ago
Read 2 more answers
When I want to find the maximum or minimum height of an object I should​
Vedmedyk [2.9K]

Answer:

Find the y-coordinate of the vertex

Step-by-step explanation:

4 0
3 years ago
Deanna gets 3 problems incorrect on her math quiz and scores 85%. How many questions were on the quiz?
katrin2010 [14]

Answer:

There were 20 questions on the quiz

Step-by-step explanation:

In this question, we are concerned with knowing the number of questions on a quiz, given that Deana had a certain percentage after scoring an amount of marks.

We proceed as follows;

Let the number of questions on the quiz be X.

Now, she got 85% by making 3 incorrect choices. This means the percentage of questions she got incorrectly would be 100-85 = 15%

what we are saying is that it is just 15% of her questions that were wrong.

This mathematically;

15% of x = 3

15/100 * x = 3

15x = 3 * 100

15x = 300

x = 300/15

x = 20

5 0
3 years ago
Which of the following expressions are equivalent to -x/y
ira [324]

Answer:

-z/e

Step-by-step explanation:

-x/y = -z/e

8 0
3 years ago
Solve for b A= \frac{a+b}{2}
lina2011 [118]
A = (a+b)/2
2*A = 2*(a+b)/2 ... multiply both sides by 2
2A = a+b
2A-a = a+b-a ... subtract 'a' from both sides to isolate b
2A-a = b
b = 2A-a

Answer: b = 2A-a

6 0
3 years ago
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