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irina [24]
3 years ago
7

7m+11=-4(2m+3) answer

Mathematics
1 answer:
Irina18 [472]3 years ago
8 0

Answer:

See below.

Step-by-step explanation:

So we have the equation:

7m+11=-4(2m+3)

Distribute the right:

7m+11=-8m-12

Add 12 to both sides:

7m+23=-8m

Subtract 7m from both sides:

23=-15m

Divide by -15:

m=-23/15\approx-1.5333

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Simplify this expression, you are y years old. Your sister is 3 years older than you. Your uncle is 4 times older than your sist
uysha [10]

Answer:The simplified expression that represents the uncle's age is

4y + 12

Step-by-step explanation:

Let y represent your age.

Your sister is 3 years older than you. This means that your sister's age is y + 3

Your uncle is 4 times older than your sister. It means that the age of your uncle would be

4(y + 3)

The simplified expression that represents your uncle's age would be

4y + 12

8 0
3 years ago
Find the x-intercept of the line whose equation is 8x + 2y = 4.<br> 04<br> 02<br> 1/2
bezimeni [28]

Answer:

1/2

Step-by-step explanation:

The x-intercept is a point on the graph that is located on any point of x but must have a y-value of 0. To find the x-intercept, we must set y in the given equation equal to 0.

8x + 2y = 4

8x + 2(0) = 4

8x = 4

x = 4/8

x = 1/2

4 0
2 years ago
The quadratic function f (x) = - 45x2 + 350x + 1,590 models the population of a city where x represents the number of years sinc
kramer

Answer: 2,215,000

Step-by-step explanation:

Given: The quadratic function f (x) = - 45x^2 + 350x + 1,590 models the population of a city where x represents the number of years since 2005.

To Find:  population of the city in 2010

We need to put x= 2010-2005 = 5

f (5) = - 45(5)^2 + 350(5) + 1,590\\\\=-1125+1750+1590 =2215

Hence, the estimated population of the city in 201 = 2215 thousands or 2,215,000 .

3 0
3 years ago
Solve the equation x2 + x = 12.
Otrada [13]

please give brainliest

Let's solve your equation step-by-step.

x2+x=12

Step 1: Subtract 12 from both sides.

x2+x−12=12−12

x2+x−12=0

Step 2: Factor left side of equation.

(x−3)(x+4)=0

Step 3: Set factors equal to 0.

x−3=0 or x+4=0

x=3 or x=−4

Answer:

x=3 or x=−4

3 0
2 years ago
Read 2 more answers
Sean paints 8/15 of a fence in 1 hour. He paints 3/10 of the fence less in the second hour. What fraction of the fence did he pa
a_sh-v [17]

Answer: \frac{3}{10}

Step-by-step explanation:

Given

Sean paints \frac{8}{15} of a fence in 1 hour

Sean paints \frac{3}{10} part less in the second hour

So, fraction he paints in the second hour = \frac{8}{15}-\frac{3}{10}=\frac{16-9}{30}=\frac{7}{30}

Paint in 2 hours = \frac{8}{15}+\frac{7}{30}=\frac{16-7}{30}=\frac{9}{30}

                          =\frac{3}{10}

No, he did not finish his job

7 0
3 years ago
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