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barxatty [35]
2 years ago
13

Anna's math test grade was 7 points less than her science test grade. The average grade was 91.5%. What did she get on each test

?
Mathematics
1 answer:
denis23 [38]2 years ago
6 0

Answer:

84.5%

Step-by-step explanation:

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3х2 = 147<br> Solve by undoing
Dmitry_Shevchenko [17]

Answer: +/- 7

Step-by-step explanation:

3x² = 147

To solve for x divide through by three first.

3x² = 147

x² = 49, now we take the square root of both side by trying to apply laws of indices.

√x² = √49

The square root will neutralize the effect of the square because

√a = a¹/² so (x²)¹/², and (x²)¹/² =

x²×¹/² = x, therefore the solution is

x = +/- 7.

3 0
3 years ago
rachel is trying to find deminsions of her new office. the office is 150 aquare feet(area+150ft2) the width of the office is 5 f
viva [34]

Answer:

Step-by-step explanation:

length =15 feet

width =10 feet

5 0
2 years ago
What number belongs in the space next to 10? Look at pic. A)19 B)18 C)17 D)16 E)15
AleksandrR [38]

the equation is 2x-1 right so all you have to do is plug and go

2x-1

2x10-1

20-1

19

so your answer would be A)19

5 0
2 years ago
Which of the following is a solution of x2 + 5x = −2?
adoni [48]
X^2 + 5x = -2
x^2 + 5x + 2 = 0

x = -b (+-) sqrt (b^2 - 4ac) / 2a
a = 1, b = 5, and c = 2

x = -5 (+-) sqrt (5^2 - 4(1)(2)) / 2(1)
x = -5 (+-) sqrt (25 - 8) / 2
x = -5 (+-) sqrt (17) / 2

answer is : negative 5 plus or minus the square root of 17 divided by 2
4 0
3 years ago
Read 2 more answers
Find the values of the six trigonometric functions of 0
Leni [432]

Step-by-step explanation:

sin theta = 12/13

cos theta = 5/13

tan theta = 12/5

cosec theta = 13/12

sec theta = 13/5

cot theta = 5/12

8 0
3 years ago
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