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2 years ago

Evaluate: 3x^2 + y when x=1 and y=-3 *

Mathematics

1 answer:

Sliva [168]2 years ago

4 0

Answer:

Step-by-step explanation:

x=1 and y=-3

so 3x^2 + y = 3*1^2 + (-3)

= 3* 1 -3

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An angle measures 10° less than the measure of its supplementary angle. What is the measure of each angle?

spin [16.1K]

Answer:

The two angles are 85 and 95 degrees

Step-by-step explanation:

Supplementary angles add to 180

Let x be one angle

The supplement is 10 less, ( x-10)

They add to 180

x+ ( x-10) = 180

2x -10 = 180

Add 10 to each side

2x-10+10 =180-10

2x= 190

Divide by 2

2x/2 =190/2

x=95

The other angle is 95-10 = 85

The two angles are 85 and 95 degrees

8 0

3 years ago

Kendra is buying a Nintendo Switch with a price tag of $300. The sales tax rate where Kendra is purchasing the

castortr0y [4]

Answer: So for the 9.5% percent I'm not sure if you mean by 9.5% off the price or more for the price so Ill just do both

If you subtract $300 from 9.5% you get 271.5 US$

But if you add $300 to 9.5% you get 328.5 US$

3 0

2 years ago

Calculate the average rate of change over the intervals [0, 20] and [60, 80]. What does the average rate on these intervals tell

Assoli18 [71]

$\frac{20 - 80}{0 - 60 } = slope \: or the \: rate \: of \: \\ change \: \\ \\ \frac{ - 60}{ - 60} = 1$
It tells you that over these intervals the balloon is going at a constant speed.

4 0

3 years ago

1.06(12.95+x)=31.27 solve for x

OverLord2011 [107]

Answer:

Step-by-step explanation:

1.06(12.95 + x) = 31.27

<u>Multiply the terms in the bracket</u>

That's

13.727 + 1.06x = 31.27

<u>Subtract 13.727 from both sides</u>

That's

13.727 - 13.727 + 1.06x = 31.27 - 13.727

1.06x = 17.543

<u>Divide both sides by 1.06</u>

That's

$\frac{1.06x}{1.06} = \frac{17.543}{1.06} \\ x = \frac{17.543}{1.06}$

We have the final answer as

Hope this helps you

6 0

3 years ago

Read 2 more answers

3 15/16 divided by 2 5/8Ask your question here

Alexeev081 [22]

$\frac{3 \frac{15}{16} }{2 \frac{5}{8}} \\ \\ \frac{ \frac{63}{16} }{ \frac{21}{8} } \\ \\ \frac{63}{16}*\frac{8}{21} \\ \\ \frac{63*8}{16*21} \\ \\ \frac{504}{336} \\ \\ 1 \frac{168}{336} \\ \\ 1 \frac{168:168}{336:336} \\ \\ 1 \frac{1}{2}$

3 0

2 years ago