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3 years ago

Please help me i need help bad .

Mathematics

1 answer:

Hoochie [10]3 years ago

4 0

Answer:

I think the answer is D. 4

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Anne and Nancy use a metal alloy that is 20% copper to make jewelry. How many ounces of a 14% and 24% alloy must be mixed to for

Gala2k [10]

<span>copper +copper = copper
0.14x+0.24(100-x) = 0.20*100 = 20</span>

7 0

3 years ago

Write 343 with an exponent by using 7 as the base

pochemuha

7^3 = 343

7×7=48
7×7×7=343

8 0

4 years ago

Read 2 more answers

What is the direct variation equation if y varies directly with x and y= -12 When x= 6?

Setler [38]

If y varies directly with x, then the ratio y/x will always be the same. Set it equal to the known values and solve for y.

y/x = -12/6

Cross multiply

6y = -12x

y = -2x

3 0

3 years ago

Read 2 more answers

Kiran jogs at a speed of 6 miles per hour when there are no hills. He plans to jog up a mountain road, which will cause his

Sergio [31]

Answer:

The equation is $t = \frac{8}{6 - r}$

Step-by-step explanation:

First off, we know r is going to be subtracted from 6 somewhere in the expression since the problem says "decreasing by r miles per hour."

If we want to see how long it would take him to jog 8 miles up to the mountain road we would have to take 8 and divide it by 6 - r.

Therefore, the equation is $t = \frac{8}{6 - r}$

Hope this helps, please mark brainliest if possible and give good ratings thanks :)

8 0

3 years ago

Solve the equation by elimination

SVEN [57.7K]

Answer:

(1,-7)

Step-by-step explanation:

y= -9x + 2.............equn(1)

y= -3x - 4..........................(2)

subtract equation (1) from equn. (2)

0= -6x + 6

subtract 6 from both sides

0-6= -6x + 6-6

-6 = -6x

divide via by -6

-6/-6 = -6x/-6

x=1

to solve for y, put x in any equation

equation (1)

y=-9x+2

y=-9(1)+2

y=-9+2

y= -7

5 0

3 years ago