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iren [92.7K]
3 years ago
6

3) 8p + 7q = 432 -7=-qhow can I solve this with substitution?​

Mathematics
1 answer:
Bess [88]3 years ago
6 0

Answer:

p=1, q=5. (1, 5).

Step-by-step explanation:

8p+7q=43

2-7=-q

------------------

-q=-5

q=5

--------

8p+7(5)=43

8p+35=43

8p=43-35

8p=8

p=8/8=1

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10 CDs costs $2.30. A package of 50 CDs costs $10.50. Which is the better buy?
user100 [1]

Answer:

Step-by-step explanation:

Plan A: 10 CDs costs $2.30, so 1 CD cost $0.23

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0.23 < 1.05

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5 0
3 years ago
Read 2 more answers
Jeremy has $1200 in spending money for the fall semester of college. He needs to purchase car insurance at $120 for 4 months, $2
abruzzese [7]

Answer:

Jeremy Will have more than just $200 to spend on Christmas presents.

Explanation :

He has a total of $1200.

He spends a $120 for car insurance. (1)

He needs to spend $25 a week for lunch. He has to do this for 16 weeks so 25*16 = $400. (2)

He needs to spend $20 a week for entertainment. For 16 weeks that'll be 20*16 = $320 (3)

adding (1) (2) and (3)

We get Jeremy's total spending will be $840. Jeremy has $1200.

1200-840 = $360

So Jeremy will have $360 to spend on Christmas present.

6 0
3 years ago
Find the surface area and the volume of the right prism shown below.
sergiy2304 [10]

Answer:

Surface area: 592

Volume: 960

Step-by-step explanation:

First the surface area:

The formula for a rectangular prism is length times width, plus width times height, plus length times height times two

So,

lw= 12 times 10 = 120

wh= 10 times 8 = 80

lh = 12 times 8 = 96

(120 plus 80 plus 96) times 2 = 296 times 2 = 592

Surface area = 592

Second, volume:

Formula is length times width times height

12 times 10 times 8 = 120 times 8 = 960

Volume = 960 cubic cm.

Hope this helped. Sorry if I was wrong.

8 0
3 years ago
6)Factor: x^2+1/3x+1/36
trasher [3.6K]

Answer:

(x+4)(x+9)=0. Your answer would be x=-4 and x=-9. Explanation:: (x+4)(x+9) x times x=x2 x(9)+x(4)=13x 4 times 9=36 = x2+13x+36.(x+4)(x+9)=0. Your answer would be x=-4 and x=-9. Explanation:: (x+4)(x+9) x times x=x2 x(9)+x(4)=13x 4 times 9=36 = x2+13x+36.

7 0
3 years ago
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