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3 years ago

What is the value of 20 + 3(7+4) + 5 +2(7+9)

2 answers:

6 0

Follow the order of operations.

First do what is inside the parenthesis

20 + 3(7+4) + 5 + 2(7+9)
20 + 3(11) + 5 + 2(16)

Next, do the multiplication

20 + 3(11) + 5 + 2(16)
20 + 33 + 5 + 32

Then add

20 + 33 + 5 + 32 = 90

aleksandrvk [35]3 years ago

4 0

The answer is 90 use order of operations

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2 years ago

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3 years ago

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Solve using the elimination method. <br> show your work <br> 2x - y = 6 <br> x + y = 6

bekas [8.4K]

Answer:

x=4, y=2

Step-by-step explanation:

2x - y = 6

x + y = 6

Add these together to eliminate y

2x - y = 6

x + y = 6

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3x = 12

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3 years ago

The height in feet of a ball dropped from a 150 ft building is given by h(t)=-16 ft^2 +150, where t is the time in seconds after

ipn [44]

Answer:

Part 1) Option A. h(2) = 86.00 means that after 2 seconds, the height of the ball is 86.00 ft

Step-by-step explanation:

we have

$h(t)=-16t^{2}+150$

where

t ----> is the time in seconds after the ball is dropped

h(t) ----> he height in feet of a ball dropped from a 150 ft

Find h(2)

That means ----> Is the height of the ball 2 seconds after the ball is dropped

Substitute the value of t=2 sec in the equation

$h(2)=-16(2)^{2}+150=86\ ft$

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3 years ago

Find the vertex: -4x² + 16x - 7

guapka [62]

Find the vertex: -4x^2 + 16x - 7

Vertex = ( x, f(x)).

x = -b/2a

x = -16/2(-4)

x = -16/-8

x = 2

f(x) = -4x^2 + 16x - 7

Let x = 2

f(2) = -4(2)^2 + 16(2) - 7

f(2) = -4(4) + 32 - 7

f(2) = -16 + 32 - 7

f(2) = 16 - 7

f(2) = 9

Vertex = (2, 9)

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3 years ago