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marishachu [46]
3 years ago
10

Allie noticed that to get her test grade, she could take Valerie's grade, multiply it by 2 and subtract 15. If Valerie's test gr

ade was x, how would you write Allie's test grade? A) 2x B) 2x + 15 C) 2x - 15 D) 15x - 2
Mathematics
1 answer:
kolbaska11 [484]3 years ago
4 0
Answer is c) 2x - 15 because x is Valerie's grade

Allie's grade is <span>taking Valerie's grade, multiply it by 2 and subtract 15</span>
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Solve the equation<br> (x-3)^3-( x - 1 )^3 + 7x^2 = 7(3x - 4 )
Yakvenalex [24]

Answer:

x= -1 or x = -2

Step-by-step explanation:

Your equation:

(x−3)^3−(x−1)^3+7x^2=7(3x−4)

Step 1: Simplify both sides of the equation.

x^2+24x−26=21x−28

Step 2: Subtract 21x-28 from both sides.

x^2+24x−26−(21x−28)=21x−28−(21x−28)

x^2+3x+2=0

Step 3: Factor left side of equation.

(x+1)(x+2)=0

Step 4: Set factors equal to zero.

x+1=0 or x+2=0

which equals to x=−1 or x=−2

8 0
2 years ago
A rectangular lawn is 24 feet wide by 32 feet long. A sidewalk will be built along the inside edges of all four sides. The remai
levacccp [35]
So the original lawn has an area
24 × 32 = 768 the new lawn will have area 425
this means the area of the sidewalk will be 768-425=343
now the sidewalk is a certain width of we draw it out and label it x we see the lawn has an area of
(32 - 2x)(24 - 2x) = 425 \\ 768 - 64x - 48x + 4 {x}^{2}  = 425 \\ 4 {x}^{2}  - 112x  + 343 = 0
use the quadratic formula to solve. then you will know how wide the sidewalk is. I will attach picture

5 0
3 years ago
What is -7x=19 as a fraction?
wlad13 [49]

Answer:

x= -19/7

Step-by-step explanation:

-7x/-7=19/-7

7x/7=19/-7

8 0
3 years ago
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VashaNatasha [74]

Step-by-step explanation:

Umm sorry but thank you.

3 0
3 years ago
Tonya went out to a restaurant for lunch. she tipped 12% of her bill, which brought the sum of the lunch bill plus the tip to $2
Morgarella [4.7K]
112% of original=28

percent measn parts out of 100
112%=112/100=1.12

'of' means multiply

112% of original=28 means
1.12 times original=28
divide both sides by 1.12
original=25

original bill was $25
4 0
3 years ago
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