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Anika [276]
3 years ago
9

Chris and Bianca got 80 points in all the spelling contest each child got more than 20 points could each child have gotten.

Mathematics
2 answers:
Nina [5.8K]3 years ago
6 0
What is the question?

ivolga24 [154]3 years ago
6 0
How many points could each child have gotten?
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Solve c= 8a-3b for a
Vesnalui [34]

Answer:

(c+3b)/8 = a

Step-by-step explanation:

c= 8a-3b

Add 3b to each side

c+3b= 8a-3b+3b

c+3b = 8a

Divide each side by 8

(c+3b)/8 = 8a/8

(c+3b)/8 = a

6 0
3 years ago
Simplify the expression. Write your answer using only positive exponents. Evaluate any numerical powers.
gtnhenbr [62]

Answer:

  • 9x⁵

Step-by-step explanation:

<u>Use properties of exponents:</u>

  • <u />a^{b} a^{c} = a^{b+c}, (a^{b} ^)^{c} = a^{bc}, 1/a^{-b}  = a^{b}

<u>Simplify the given expression:</u>

  • 3⁴⋅x⋅(3/x²)⁻² =
  • 3⁴·x·(3x⁻²)⁻² =
  • 3⁴·x·(3⁻²)(x⁻²ˣ⁻²) =
  • 3⁴⁻²·x¹⁺4 =
  • 3²·x⁵ =
  • 9x⁵

5 0
2 years ago
A.28.0<br><br> B.19.8<br> C.14.0<br><br> D.3.7
Lady_Fox [76]
Sin(angle) = opposite leg / hypotenuse

Sin(45) = Opposite leg / 28

Opposite Leg = 28 * Sin(45)

Opposite Leg = 14 SQRT(2) = 19.8


7 0
3 years ago
Difference Between ten and a number is the sum of eight and number <br> Help !!?
Murrr4er [49]

Answer:

x = 1

Step-by-step explanation:

We will represent the unknown number as x

10 - x = 8 + x

Add x to both sides

10 - x + x = 8 + x + x

10 =  8 + 2x

Subtract 8 from both sides

10 - 8 = 2x

2 = 2x

Divide both sides by 2

1 = x

x = 1

3 0
3 years ago
0.3 ÷ 42 Will someone please help me with the method on how to do this it is very hard.
slamgirl [31]

The answer is 1/140

Work Shown

0.3 / 42

Convert and Rewrite

3/10 x 1/42

Reduce The Numbers With the greatest Common divisor 3

1/10 x 1/14

Multiply the fractions

1/140 or

AlTernative Form  0.007114285 , -1 over 140


I Hope This Help

-Dante

3 0
3 years ago
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