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3 years ago

Which expression has a value of 20?

2 answers:

7 0

B. (16-8)x2+4, remember PEMDAS, you do what’s in the parenthesis first (16-8) and get 8. Then you need to multiply next, so you multiply 8 and 2, which gives you 16 and then simply add 4, giving you a final answer of 20.

Lubov Fominskaja [6]3 years ago

6 0

b Is the correct answer

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The archway to the entrance of an art gallery can be model by y= -1/3(x-5)(x+5) where x and y are measured in feet. The x-axis r

NikAS [45]

Answer:

x=5 feet

Step-by-step explanation:

At floor level y=0

If the expression is:

$0=1/3(x-5)(x+5)\\0=1/3(x^2-25)\\0=1/3x^2-25/3\\25/3=1/3x^2\\25=x^2\\x=5$

But, with the negative sign, the answer is x= 5i (where i is imaginary)

3 0

2 years ago

Multiply 4/5 by the reciprocal of −2/10.

Svetach [21]

Answer:

4/5*reciprocal of -2/10

The reciprocal of -2/10 is 10/-2

4/5*10/2

Cancelling the numbers

-4 is the answer

Step-by-step explanation:

I hope it will help you :)

7 0

3 years ago

Read 2 more answers

Solve for the roots in simplest form using the quadratic formula:

Softa [21]

Step-by-step explanation:

4x² - 12x + 17 = 0

i is an imaginary number and it equals √-1, and you usually put it when the number under the root is negative.

So √-5 = √5i and √-4 = 2i

3 0

2 years ago

The sum of two numbers is 27. One number is 3 more than the other. Write and solve a system of equations to find the two numbers

givi [52]

X + y = 27
x = y + 3

y + 3 + y = 27
2y + 3 = 27
2y = 27 - 3
2y = 24
y = 24/2
y = 12

x = y + 3
x = 12 + 3
x = 15

ur numbers are 12 and 15

7 0

3 years ago

Read 2 more answers

Compute show all of your work: 8X4-4/2+1

Pepsi [2]

8*4-4/2+1
32-4/2+1
32-2+1
=31 answer
So, the answer to this question is 31

5 0

2 years ago