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IrinaVladis [17]
3 years ago
8

Examine the system of equations. 6x + 11y = –57 –8x – 27y = 65 Sherri multiplied the first equation by 8 and the second equation

by 6 to eliminate the x-variable. Could Sherri also multiply the equations by two different numbers to eliminate the x-variable? Which statements are true? Check all that apply. Yes, she could use 27 and 11. Yes, she could use 4 and 3. Yes, she could use –8 and –6. Yes, she could use –27 and –11. Yes, she could use –4 and –3. Yes, she could use 65 and 57. No, these are the only effective multipliers.
Mathematics
1 answer:
AlekseyPX3 years ago
7 0

Answer:

Step-by-step explanation:

B C and E

Yes, she could use 4 and 3.

Yes, she could use –8 and –6.

Yes, she could use –4 and –3.

Are the correct answers..

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Alex is creating an outdoor structure out of two 12 foot boards. The boards must have an angle of elevation
Whitepunk [10]

Answer:

5.0 ft - 5.6 ft

Step-by-step explanation:

Given that the structure is to be made using two 12 foot boards, then we expect the total perimeter to be equal to (2*12)= 24 ft.

Using the angle of elevation, 40° and the width of 8 ft then you can apply the formula for tangent of a triangle where ;

Tan α = opposite side length/adjacent length

Tan 40°= h/8

h= 8 tan 40° = 6.71 ft

Applying the cosine of an angle formula to find the length of the sliding side

Cosine β = adjacent length /hypotenuse

Cosine 40°= 8/ sliding side length

sliding side length = 8/cosine 40° =10.44 ft

Checking  the perimeter = 10.44 +8+6.71= 25.15 ft

This is more than the total lengths of the boards, so you need to adjust the height as;

24 - 18.44 = 5.56 ft ,thus the height should be less or equal to 5.56 ft

h≤ 5.6 ft

6 0
3 years ago
138 invitations to 75 invitations,what is the percent change?
Thepotemich [5.8K]

Answer:

Convert to a decimal by dividing the numerator by the denominator.

1.84

invitations

Step-by-step explanation:

7 0
3 years ago
The distance between two subway stations is 3 miles. If a train
dolphi86 [110]

Answer: 3

Step-by-step explanation:

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6 0
3 years ago
I need help with this problem and show your work plz thanks
coldgirl [10]
Well is just their sum, thus

\bf \cfrac{3}{4}+\cfrac{2}{3}\impliedby \stackrel{LCD~is}{12}\implies \cfrac{(3)3+(4)2}{12}\implies \cfrac{9+8}{12}\implies \cfrac{17}{12}\implies 1\frac{5}{12}
5 0
3 years ago
Can someone please help me
Allisa [31]

Answer:

I think it is C

Step-by-step explanation:

Reason being because the question said at least 15 points more so it can't

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hope that helps

4 0
3 years ago
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