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stich3 [128]
3 years ago
15

A student is trying to solve the set of two equations given below:

Mathematics
1 answer:
Brrunno [24]3 years ago
7 0
To eliminate z multiply equation A by 7 and subtract both equations or divide equation B by 7 and subtract. (in this case, multiplying Equation A by 7 would be easier)
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4. The electrical resistance of a wire varies inversely as the square of its radius. If the resistance is 0.80 ohm when the radi
snow_lady [41]

9514 1404 393

Answer:

  0.261 ohm

Step-by-step explanation:

If the radius increases by a factor of 0.7/0.4= 7/4, the square of this factor is (7/4)^2 = 49/16. The inverse of this square is 16/49, which is the factor by which the resistance changed.

The resistance of the larger wire is ...

  (16/49)(0.80 ohm) ≈ 0.261 ohm

6 0
3 years ago
How do you give someone a brainliest?
Margaret [11]

When two people answer your question, there is a crown on both, then click the one you want to give it to.

(im pretty sure this is right, i kinda have a bad memory)

5 0
3 years ago
Read 2 more answers
Is the product of two irrational numbers always irrational? Justify your answer.
Anestetic [448]
The sum of two irrational numbers, in some cases Will be irrational. However, if the rational parts of the numbers have a 0 sum (cancel each other out), the sum will be rational.
7 0
4 years ago
Help me pleeeeeeeeeeeeeeeease
pychu [463]

Answer:

n ≥ 29

She needs to do more than 29 pushups on the sixth day.

Step-by-step explanation:

First, we need to use the formula for finding the average. We currently have numbers for the first 5 days.

(22+26+21+25+27+n)/6 = 25

Multiply both sides by 6.

25*6 = 150

150-27-25-21-26-22=x

x=29

Since it is an inequality, Sarah needs to do more than 29 pushups on the sixth day.

6 0
2 years ago
$27 for four large pizzas or $32 for five large pizzas?
diamong [38]

Answer:

$32 for five large pizzas.

Step-by-step explanation

Well, 27 ÷ 4 = 6.75 per pizzas. 32 ÷ 5 = $6.4 per pizza. For five, you pay less.

Your welcome °ω°

4 0
3 years ago
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