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SashulF [63]
3 years ago
6

Simplify (-7/8)(-3/4)

Mathematics
2 answers:
nirvana33 [79]3 years ago
4 0
It would be 21/32. To find this out, you would need to first multiply (-7/8) by (-3/4) which would give you 0.65625. Then look at your answer choices and divide each one ( (/) = same as dividing) until you get 0.65625 as one of the values. 
Reika [66]3 years ago
3 0

Answer:

\frac{21}{32}

Step-by-step explanation:

Given expression,

(-\frac{7}{8})(-\frac{3}{4})

=\frac{-7}{8}\times \frac{-3}{4}   (\because -\frac{a}{b}=\frac{-a}{b})

=\frac{-7\times -3}{8\times 4}    ( Multiplication of fractions )

=\frac{21}{32}

Third option is correct.

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Kayla squared a number x and added this result to -6.5. This gave her an answer of 42.5.
ladessa [460]

Answer:

7, -7

Step-by-step explanation:

x^2-6.5= 42.5 add 6.5 to both sides

x^2= 49

The square root of 49 is 7 and -7.

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3 years ago
A car travels 6 miles in 5 minutes. How fast is it going in miles per hour? How fast is it going in meters per second?
belka [17]

Answer:

72 m\ p.h.

Step-by-step explanation:

we have 60 minute in one hour

we must divide 60 by 5=12

then 6*12=72!!!

it is very easy

5 0
3 years ago
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What is the inverse of f(x)=x^4+7 for x&gt;0 where function g is the inverse of function f?<br> -
Ann [662]

Answer:

g(x) = \sqrt[4]{x-7},~ x\geq 7

Step by step explanation:

y= f(x) = x^4+7\\\\\text{Replace x with y and solve for y:}\\\\~~~~~~~x = y^4 +7\\\\\implies y^4 = x-7\\\\\implies y = \pm\sqrt[4]{x-7}\\\\ \implies f^{-1}(x) = \pm\sqrt[4]{x-7}

7 0
1 year ago
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3 years ago
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Which two ratios make a proportion. a) 9÷12 and 15÷20 b) 4/25 and 17/101
Effectus [21]

Answer:

Use cross products to see if each pair of ratios forms a proportion. Replace each box with = or ≠.

1.

7/5 ? 15/10

=

≠

2.

6/8 ? 15/20

=

≠

Solve each problem.

3.

2/3 = 1.2/x

x = 18

x = 1.8

x = 0.2

x = 10

4.

4/5 equals 8/x plus 2

x = 4

x = 9.5

x = 2

x = 8

Create a proportion and solve.

5.

A recipe uses 3 cups of flour to make 48 cookies. How much flour is needed to make 72 cookies? (1 point)

3/48 = 72/x, x = 1,152 cups

3/48 = x/72, x = 4.5 cups

3/48 = x/72, x = 2 cups

x/48 = 3/72, x = 2 cups

Here are my answers. Are they correct? Thanks!

1. ≠

2. =

3. 1.8

4. x = 8

5. 3/48 = x/72, x = 4.5 cups

Sorry if this answer didn't help. Socratic can help! This learning app, powered by Google AI, helps you understand your school work at a high school and university level. Ask Socratic a question and the app will find the best online resources for you to learn the concepts.

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