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Zolol [24]
3 years ago
7

70 points and i’ll give brainliest!! please answer all the questions on the page! must show work and how you got the answer. ple

ase help i’m desperate!!!

Mathematics
1 answer:
Bezzdna [24]3 years ago
3 0

6. One variable only so pretty straightforward.

length-x+4

width-x

x+x+4=80

2x=76

x=38

x+4=42

answer: length 42cm and width 38cm

7. Another money problem!

n-# of nickels

q-# of quarters

n=3+q

0.05n+0.25q=2.85

Substitution works like a charm!

0.05(3+q)+0.25q=2.85

0.15+0.05q+0.25q=2.85

0.3q=2.7

q=9

n=3+q

n=3+9

n=12

answer: 9 nickels and 12 quarters

8. One variable situation again.

Ann's money-2b+9

Betty's money-b

b+2b+9=60

3b=51

b=17

2b+9=43

answer: Ann has $43 and Betty has $17.

9. # of red m&m's-x+1

# of blue m&m's-x

x+1+x=13

x=6

x+1=7

answer: 6 blue and 7 red m&m's

10. a-number of adult tickets

s-number of student tickets

a+s=785 ----> a=785-s

5a+2s=3280

5(785-s)+2s=3280

-3s=-645

s=215

a+s=785

a+215=785

a=570

answer: 215 children tickets and 570 adult tickets

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Answer:

B. h=2A/(b1+b2) . . . . parentheses are needed

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... 2A/(b1 +b2) = h

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3 years ago
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Svetllana [295]

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I  -7 times 5x = -35x

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3 0
3 years ago
Read 2 more answers
Determine whether the vectors u and v are parallel, orthogonal, or neither. u = (5,4) v = (-10,9)
12345 [234]

Answer:

Neither

Step-by-step explanation:

5 x -10 = -50

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6 0
3 years ago
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Answer: B and F

Step-by-step explanation:

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So, the increasing percentage when the original amount increases to 75,

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So the decreasing percentage when the original amount decreases to 45,

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Thus, We found that the ratio of the percent increase is not the same as the percent decrease ( because,   \frac{200}{3}\neq \frac{40}{1}

Also, The original amount of the present increase is different from the original amount for the persons decrease. ( Because, 75\neq 45

Therefore, Option B and F is correct only.



5 0
3 years ago
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Three more than twice a number is equal to four less than number .Find the number​
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