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OlgaM077 [116]
3 years ago
11

Someone please help me with this algebra problem

Mathematics
2 answers:
xxTIMURxx [149]3 years ago
7 0

Step-by-step explanation:

8.4 is the ans

4x+8y=40

4x + 6.4=40

4x=40-6.4

4x=33.6

x=33.6÷4

x=8.4

Otrada [13]3 years ago
6 0

Answer:

4x+8y=40

4x+(8+0.8)=40

4x+6.4=40

4x+6.4-6.4 =40-6.4

4x=33.6

4x÷4=33.6÷4

X=8.4

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Find the missing dimension of the cylinder. round your answer to the nearest whole number
Ulleksa [173]

Answer:

11 meters

Step-by-step explanation:

Use the formula:

V = \pi r^{2} h

V = 7599, h = 20, π = 3.14

Plugin the numbers and solve for r

7599=3.14(20)r^{2} \\7599=62.8r^{2} \\7599/62.5=62.8r^{2} /62.8\\121=r^{2} \\\sqrt{121}=\sqrt{r^{2} } \\r=11

8 0
2 years ago
For every 4 minutes he runs, he walks for 5 minutes. Yesterday he walked for 35 minutes. How many minutes did he run?
Dominik [7]
35/5=7*4=28
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5 0
3 years ago
Use the x-intercept method to find all real solutions of the equation.<br> x^3-8x^2+9x+18=0
meriva

Answer:

a. x=-1,3,\:or\:6

Step-by-step explanation:

The given equation is;

x^3-8x^2+9x+18=0

To solve by the x-intercept method we need to graph the corresponding function using a graphing calculator or software.

The corresponding function is

f(x)=x^3-8x^2+9x+18

The solution to x^3-8x^2+9x+18=0 is where the graph touches the x-axis.

We can see from the graph  that; the x-intercepts are;

(-1,0),(3,0) and (6,0).

Therefore the real solutions are:

x=-1,3,\:or\:6

8 0
4 years ago
Read 2 more answers
BRAILIEST IF RIGHT Which other expression has the same value as (-14) - 8 ?
stiks02 [169]

Answer:

It's the last one (-14) +(-8)

Step-by-step explanation:

since (-14)-8 is -22 and the last one is also -22

4 0
3 years ago
Solve the second equation.<br>2x - y = 8<br>First, solve for (-y).<br>--y =<br>​
kicyunya [14]

Answer:

-y=-2x+8\\y=2x-8

Step-by-step explanation:

To solve, first subtract 2x from both sides.

2x-y=8\\-y=-2x+8

You appear to want the solution for -y, so I've included it. Given that you also want the solution for y, divide both sides by -1.

-y=-2x+8\\y=2x-8

5 0
3 years ago
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