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3 years ago

Why is (3,-5) not a solution to -x+4y=-15

1 answer:

3 0

C) It doesn’t satisfy either the top or bottom equations.

When we plug them into the top equation:
$- 3 + 4( - 5) = - 15$
Simplify:
$- 3 + ( - 20) = - 15 \\ \\ - 23= - 15$
Because the statement of -23 = -15 is wrong, the solution pair is wrong for the top equation.

When we plug them into the bottom equation:
$- 2(3) - 3( - 5) = - 8$
Simplify:
$- 6 - ( - 15) = - 8 \\ \\ 9 = - 8$
9 = -8 is not a valid statement, so the pair doesn't satisfy both of the equations.

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30 points!!!! the end of ww2

lawyer [7]

Answer:

1. placed under house arrest during a coup by high-ranking members of his own government

2.. He could fall either because of pressure from the military, who are very discontented with Gorbachev, or he could fall as a result of popular protests

3.He was elected the leader of (still) Soviet Russia (not the whole of USSR) based on anti-soviet populism, then worked actively to dissolve the USSR in order to become the ruler of a sovereign nation as opposed to only a part of it.

4.wars

Step-by-step explanation:

7 0

3 years ago

The product of 7 and x is less than or equal to -21

Mars2501 [29]

Answer:

x needs to be smaller or equal to -3

Step-by-step explanation:

-3x7 = -21

you get there by dividing -21 by 7

example smaller number: -4x7 = -28

4 0

3 years ago

Read 2 more answers

Find the area of the following geometric figure

romanna [79]

The area of the triangle is 90 m²

Explanation:

Given that the base of the triangle is 15 m

The altitude of the triangle is 12 m

<u>Area of the triangle:</u>

The area of the triangle can be determined using the formula,

$Area=\frac{1}{2}bh$

where b is the base and h is the altitude

Thus, we have,

$b=15$ and $h=12$

Substituting the values in the above formula, we get,

$Area=\frac{1}{2}(15)(12)$

Multiplying the terms, we get,

$Area=\frac{180}{2}$

Dividing, we get,

$Area=90 \ m^2$

Therefore, the area of the triangle is 90 m²

4 0

3 years ago

A middle school mathematics teacher except a teaching position that pays 40,000 per year, each year the expected raise is $2000.

Grace [21]

9514 1404 393

Answer:

$2,070,000

Step-by-step explanation:

The series of salaries has a first term of $40,000 and a common difference of $2,000. The sum of them is given by the formula ...

Sn = (2a1 +d(n -1))(n/2)

where a1 is the first term of the series, d is the common difference, and n is the number of terms.

In this problem, we have ...

a1 = 40,000; d = 2,000; n = 30

so the sum is ...

S30 = (2(40,000) +2,000(30 -1))(30/2) = (80,000 +58,000)(15)

S30 = 2,070,000

The teacher will earn $2,070,000 over 30 years on this salary schedule.

4 0

3 years ago

The figure below shows half circles at the ends of a rectangle with the demensions shown. Which is closest to the area of the fi

loris [4]

The closest answer is 95 square inches. Here is why. You can find the area of the rectangle by multiplying the length by the width. This would be 15 x 5 = 75 square inches. The area of the whole circle that is created when you put both halves together would be found by multiplying 3.14 x 2.5 in (the radius) x 2.5 in. This answer is about 20 square inches. The combined area is approximately 95 square inches.

7 0

4 years ago