2 years ago

Find the sum of 7x^2-3x+5 and 8x+2

Mathematics

1 answer:

netineya [11]2 years ago

5 0

Answer:

7x²+5x+7

Step-by-step explanation:

7x²-3x+5+8x+2

7x²+5x+7

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Jayne is driving 440 miles and wants to make the trip in 8 hours. write an equation and solve to determine the average speed jay

Nuetrik [128]

Distance÷time
440÷8= 55
Therefore he needs to drive at the speed of 55 miles/hour

7 0

2 years ago

After 3.5 hours ,pasha had traveled 217 miles if she travels at the constant speed how far will she have travelled after 4 hours

vesna_86 [32]

Answer:

248 miles

Step-by-step explanation:

we know that

After 3.5 hours ,Pasha had traveled 217 miles

using proportion

Find out how many miles she will have traveled after 4 hours

$\frac{3.5}{217}\ \frac{hours}{miles}=\frac{4}{x}\ \frac{hours}{miles}\\\\x=217(4)/3.5\\\\x=248\ miles$

4 0

3 years ago

Which exponential function is represented by the values in the table?

svlad2 [7]

Here we use the equation

$y = a(b)^x$

Taking points (0,4), (1,2)

Substituting the point (0,4) , we will get

$4 = a(b)^0
\\
4 = a(1) \\
a =4$

Substituting (1,2) we will get

$2 = 4 (b)^1
\\
2/4 = b
\\
b = 1/2$

So we have

$a = 4, b = 1/2$

Therefore , required equation is

$y = 4(1/2)^x$

7 0

3 years ago

Read 2 more answers

What is 50 percent of 18?

Effectus [21]

Steps:
18*0.5=9

Answer:

9

3 0

2 years ago

Read 2 more answers

Jocelyn gave the cashier $50 to pay for 3 shirts. The cashier gave her $5.03 in change. Each shirt cost the same amount. W

Goryan [66]

Answer:

14.9

Step-by-step explanation:

50-5.03 = 44.97

44.97 ÷ 3 = 14.99

8 0

2 years ago