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IRISSAK [1]
3 years ago
9

Evaluate the expression when b=4 and x=-2 . b-4x

Mathematics
2 answers:
oee [108]3 years ago
4 0

Answer:

12

Step-by-step explanation:

b-4x

Plug in 4 as b and -2 as x

= (4)-4(-2)

Multiply 4 and 2

= 4-(-8)

Two negatives make a positive

= 4+8

= 12

I hope this helps!

mihalych1998 [28]3 years ago
4 0
Yes, the answer above me is correct.
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A hot air balloon in flight begins to ascend at a steady rate of 120 feet per minute. After 1.5 minutes, the balloon is at an al
azamat

Answer:

The balloon will not reach 2,500 feet after 4 minutes.

Step-by-step explanation:

The equation of the line in the point-slope form is

y-y_1=m(x-x_1)

A hot air balloon in flight begins to ascend at a steady rate of 120 feet per minute, then the slope is

m=120

After x_1=1.5 minutes, the balloon is at an altitude of y_1=2,150 feet. This means, the line passes through the point (1.5, 2,150).

Substitute the slope and point coordinates into the equation:

y-2,150=120(x-1.5)

We know that after 3 minutes, the balloon is at an altitude of 2,330 feet. Check this:

2,330-2,150=180\\ \\120(3-1.5)=120\cdot 1.5=180\\ \\2,330-2,150=120(3-1.5)

Now, find the height after 4 minutes:

y-2,150=120(4-1.5)\\ \\y=120\cdot 2.5+2,150=300+2,150=2,450

Thus, the balloon will reach only 2,450 feet after 4 minutes.

4 0
3 years ago
Please I need help it’s for a quiz I will give you a Brainly
tankabanditka [31]

Answer:

A

Step-by-step explanation:

Hopefully this helps

4 0
3 years ago
Read 2 more answers
If a=3 and b= 8 what is the answer and how to solve b-3-3
Tems11 [23]
Since b is a variable ( unknown) we replace b with 8 since its given to us so the equation turns to 8-3-3 which we do 8-3=5-3=2

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2 years ago
Read 2 more answers
Select the correct answer.
jarptica [38.1K]
A is the correct answer
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