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OleMash [197]
3 years ago
7

Please Help Me Quick with this math problem!!!!!!!!!!!!!!

Mathematics
2 answers:
Nadya [2.5K]3 years ago
8 0

Answer:

x=−5 and y=−1

Step-by-step explanation:

Let's solve your system by substitution.

y=2x+9;y=−x−6

Step: Solvey=2x+9for y:

y=2x+9

Step: Substitute2x+9foryiny=−x−6:

y=−x−6

2x+9=−x−6

2x+9+x=−x−6+x(Add x to both sides)

3x+9=−6

3x+9+−9=−6+−9(Add -9 to both sides)

3x=−15

3x

3

=

−15

3

(Divide both sides by 3)

x=−5

Step: Substitute−5forxiny=2x+9:

y=2x+9

y=(2)(−5)+9

y=−1(Simplify both sides of the equation)

Hope this helps!

weeeeeb [17]3 years ago
3 0

Answer:

x= -5    y= -1

Step-by-step explanation:

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2 less than the quotient of 56 and 7
Umnica [9.8K]

Answer:

54 and 5

Step-by-step explanation:

56-2 is 54

7-5 is 2

have a good day my little friend learning his 1st addition

3 0
3 years ago
Read 2 more answers
Use simultaneous equations solve the following problem.
Genrish500 [490]

Let E represent English test and M represent Math test.

M + E = 164

+ <u>M - E = 22</u>

2M = 186 <em>eliminated E by adding the two equations</em>

M = 93 <em>divided both sides by 2</em>

Now, plug that value into either of the equations to solve for E.

M - E = 22 → 93 - E = 22 → -E = 22 - 93 → -E = -71 → E = 71

Answer: Math = 93, English = 71

6 0
3 years ago
Read 2 more answers
Given q(x)=3x and r(x)=x2. What is (r◦q)(2)?
guapka [62]

Answer:

<h2>36</h2>

Step-by-step explanation:

(r\circ q)=(x)=r\bigg(q(x)\bigg)\\\\r(x)=x^2;\ q(x)=3x\\\\\text{substitute}\\\\(r\circ q)(x)=(3x)^2=3^2x^2=9x^2\\\\(r\circ q)(2)=9(2^2)=9(4)=36

6 0
3 years ago
The point (2,6) lies on the graph of the equation y = kx^2 - 3x Find the value of K
MAVERICK [17]

Answer:

<h2>k = 3</h2>

Step-by-step explanation:

y = kx² - 3x

Since the points lie on the graph we can substitute the values of x and y that's

( 2 ,6) into the equation to find k.

We have

6 = (2)²k - 3(2)

6 = 4k - 6

4k = 6 + 6

4k = 12

Divide both sides by k

That's

\frac{4k}{4}   =  \frac{12}{4}

We have the final answer as

<h3>k = 3</h3>

Hope this helps you

4 0
3 years ago
What is the volume of a hemisphere with a radius of 3 cm, rounded to the nearest tenth of a cubic centimeter?
Kaylis [27]

Formula: V = (2/3) π r 3.

Radius is 3cm.

So, now we can plug it in to solve for the volume.

V = (2/3) π 3^3

First, let's multiply 3^3.

3^3 = 27

Then, 27 x π = 84.82

After, multiply by 2/3.

84.82 x 2/3 = 56.55

Lastly, round 56.55 to the nearest tenth of a cubic centimeter.

56.55 = 56.6

Therefore the volume of a hemisphere with a radius of 3cm is 56.6cm^3.

8 0
3 years ago
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