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lys-0071 [83]
3 years ago
11

What would be the most appropriate first step if you wanted to solve this system of equations using elimination? 3x+2y=7 x+4y=−8

A. Multiply the first equation by −1 B. Multiply the second equation by −2 C. Multiply the first equation by −2 D. Multiply the second equation by -1−1
Mathematics
1 answer:
Alexus [3.1K]3 years ago
7 0

Answer:

A. Multiply the first equation by −1

Step-by-step explanation:

From the above question, our system of equations is

3x+2y=7... Equation 1

x+4y=−8..... Equation 2

Hence, solving by Elimination, the first step would be if we are eliminating x first, we are to Multiply Equation 1 by -1

Option A is the correct option

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Drupady [299]

Answer:

56°

Step-by-step explanation:

2x+3x+5=90

5x=90-5

5x=85

x=85÷5

x=17

m<2=3x+5=3(17)+5=51+5=56

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4 years ago
Can someone please helppp I’m very desperate this is due tonight! Please show me how you got the answer
vazorg [7]

Answer:

4) 216

5) 216%

6) It's just like the bird's eye view of the tank, exept it's 2d.

Step by step solutions:

4) Draw a cube. Draw another cube but smaller. Label sides of the big cube 6x and the small cube x. Find the volume of each, which are 216x^3 and x^3. Divide (216x^3)/(x^3) and you get 216 times.

5) It wants percentage of big over small, so redraw the diagrams from #4 and instead of x, set x as 2. So the big sides are 12 and the small sides are 2. But you should write the sides as 2*6 and 2. Then, you calculate the volumes: 12^3 = 1728 and 2^3 = 8. Percentage of small tank over big tank would be 8/1728, but we want the opposite. We want something bigger than 1. So, we take the reciprocal and we get  1728/8 % = 216%. All along, the times was the percentage.

6) Draw a cube and draw a cube or a rectangular prism, but be warned, we don't know exactly what shape it is. Hint: just do a cube with a little exagerated side length just in case teacher is bad. OK back to this. Then, draw a line through the cube/rectangle and you get a rectangle-like shape.

7 0
4 years ago
Express the fractions 1/2, 3/16, and 7/8 with an LCD. A. 1/4, 3/4, and 7/4 B. 8/16, 3/16, and 14/16 C. 1/32, 3/32, and 7/32 D. 4
I am Lyosha [343]
B. 8/16, 3/16, and 14/16
7 0
3 years ago
Read 2 more answers
What is the vertical distance from the origin to the point (2,9)
Ksenya-84 [330]

Answer: The answer should be 9.2195

Step-by-step explanation:They tell us the point is 2.9 and they are asking the distance from the origin which is zero. So we can use pythagorean theorem. A²+B²=C² Look at it as a triangle. They have given us A and B, so you can find C² using those information. If you plot the point in the line you know that A=2 and B=9. Using the formula will be 2²+9²=C² ⇒ 4+81=C² ⇒ 85=C². To get rid of the power of 2 in c we have to square both side to cancel it out. C would equal 9.2195

3 0
3 years ago
Two angles form a linear pair. If the measure of one angle is 47, what is the degree measure of the other angle?
cupoosta [38]

Answer:

The other angle would be equal to 133 degrees.

Step-by-step explanation:

All linear pairs are supplementary angles, which means that they are equal to 180. So we can find the second angle by using the following angle.

47 + x = 180

x = 133

8 0
3 years ago
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