2 years ago

Numbers 18 and 19 Show work

Mathematics

1 answer:

miskamm [114]2 years ago

6 0

Just use photo math

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Please help me ASAP?!!

Blababa [14]

Answer:

(0,-5) and (-4,3)

Step-by-step explanation:

The given equations are

$\left \{ {{x^2+y^2=25} \atop {2x+y=-5}} \right.$

Make y the subject in the second equation;

$y=-2x-5$

Substitute into the first equation;

$x^2+(-2x-5)^2=25$

Expand:

$x^2+4x^2+20x+25=25$

$x^2+4x^2+20x+25-25=0$

$5x^2+20x=0$

$5x(x+4)=0$

$\Rightarrow x=0,x=-4$

When x=0,

$y=-2(0)-5=-5$

This gives; (0,-5)

When x=-4

$y=-2(-4)-5=3$

This gives (-4,3)

7 0

2 years ago

Read 2 more answers

Determine the miss ing number in each sequence 30, ,19,13 1/2

enot [183]

The answer is 24.5.

The numbers are decreasing by 5.5, therefore, 30 - 5.5 = 24.5, and 24.5 - 5.5 = 19.

5 0

3 years ago

The heights of the members of a high school class

sergey [27]

Answer:

the average height is between 65 and 72 inches

Step-by-step explanation:

4 0

2 years ago

Taille LHRISTINE

BartSMP [9]

Answer:

$-5 = x$

Step-by-step explanation:

$7(4x + 9) - 10 = -87 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: + \: 10 \: \: \: \: + 10 \\ \\ \frac{7(4x + 9)}{7} = -\frac{77}{7} \\ \\ 4x + 9 = -11 \\ \: \: \: \: \: \: -\: 9 \: \: \: \: \: - \: 9 \\ \\ \frac{4x}{4} = -\frac{20}{4} \\ \\ x = -5$

** The above answer is written in reverse, which is the exact same result.

I am joyous to assist you anytime.

5 0

3 years ago

What is the following product?

Rufina [12.5K]

Can u put a picture

4 0

2 years ago