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zlopas [31]
3 years ago
7

Need help?????????!!!!!!!

Mathematics
1 answer:
julsineya [31]3 years ago
3 0

Answer:

73 and -23 hope this helped hon :)

Step-by-step explanation:

y=-8x+9

plug in -8

y=-8(-8)+9

y=64+9

y=73

y=-8x+9

plug in 4

y=-8(4)+9

y=-32+9

y=-23

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At Clement's Jr. High School, a student needs an 86 average to earn a B. Sue's average on
andriy [413]

Answer:

Sue must score 94 on the final test to earn a B.

Step-by-step explanation:

There are five tests in total.

Sue's average on the first four tests is 84.

If after the final test, she scores X, she will have a B on average of five tests.

We have the following equation:

86 = (4 × 84 + X)/5

<=> X = 5 × 86 - 4 × 84

=> X =  94

5 0
3 years ago
If I got 89 marks out of 121, what is my % average?
LenKa [72]

You divide it

\frac{89}{121}

Your percent average is

74%

5 0
3 years ago
25,812-4.2d=31.311-5.5d
Bas_tet [7]

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

25812−4.2d=31.311−5.5d

Step 1: Simplify both sides of the equation.

25812−4.2d=31.311−5.5d

25812+−4.2d=31.311+−5.5d

−4.2d+25812=−5.5d+31.311

Step 2: Add 5.5d to both sides.

−4.2d+25812+5.5d=−5.5d+31.311+5.5d

1.3d+25812=31.311

Step 3: Subtract 25812 from both sides.

1.3d+25812−25812=31.311−25812

1.3d=−25780.689

Step 4: Divide both sides by 1.3.

1.3d

1.3

=

−25780.689

1.3

<h2><u><em>d=−19831.299231</em></u></h2>

6 0
3 years ago
Read 2 more answers
Find the zeros for 2x^2-24=26. what id the positive value of x?
Oksana_A [137]

Answer:

x=5

Step-by-step explanation:

move the constant to the right

calculate

devide both sides

simplify the equation

seperate the solution

(x=5)

6 0
2 years ago
A publisher needs to send many books to a local book retailer and will send the books in a combination of small and large boxes.
dezoksy [38]

Answer:

20*s+30*l = 280

4*s=l

Step-by-step explanation:

Let's say that the number of small boxes is s and the number of large boxes is l. Then, 20*s equals the amount of books in small boxes (as there are 20 books per small box), and 30*l for the amount of books in large boxes. Then, we know that 4 times the amount of small boxes, s, equals l, so 4*s=l. Then, as we know that the amount of books that can be held is 280, we can add the amount of books for each type of box, or 20*s+30*l, to get 280. Our equations are as follows:

20*s+30*l = 280

4*s=l

As we can define l in terms of s, making it so that we can limit the top equation to 1 variable, we can use this to determine the number of each type of box

8 0
3 years ago
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