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netineya [11]
3 years ago
5

Your mother takes u to your grandparents house for dinner. She drives 60 mins at a constant speed of 40 mph. She reaches the hig

hway and quickly speeds up and drives another 30 mins at a constant speed of 70 mph
Tell me how to do this In formula I need to find distance
Mathematics
2 answers:
vlabodo [156]3 years ago
8 0
Distance formula distance=speed×time
Mkey [24]3 years ago
5 0
60 mins= 1 h . 30 mins = 0.5 (1/2) h
before she speeded up, she had gone: s = t×v = 1h ×40 mph = 40 (m)
the length of the high way she drove: s = t×v = 0.5h × 70 mph = 35 (m)
the length of the way from your house to grandparents' house: 40+35=75 (m)
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Solution

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7 0
1 year ago
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1. No answer ( may be due to incorrect question)

2. x = -3

y = 4

3. x= 4

y = 2

4.x = -63/40

y= -19/20

Step 1

Multiply equation 1 by the coefficient of x in equation 2

Multiply equation 2 by the coefficient of x I'm equation 1

(after completing this step you will derive equation 3 and 4 )

Step 2

Subtract equation 4 from equation 3

Step 3

Divide both sides of the equation by the coefficient of y

Step 4

substitute your value for y in equation 1 or 2

(after this you will derive the values of x)

Note : This method is for the Elimination of x

I hope it helps

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3 years ago
Does increase in sample size increases degrees of freedom for t-tests.
Elena-2011 [213]
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3 0
3 years ago
Please help! 1 question! 50 points! Show your work!
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Answer:

  \dfrac{2x}{3a^2}

Step-by-step explanation:

\dfrac{3a^4b}{2x}\cdot\dfrac{4x^2}{9a^6b}=\dfrac{3\cdot 4}{2\cdot 9}a^{4-6}b^{1-1}x^{2-1}=\dfrac{2x}{3a^2}

The applicable rules of exponents are ...

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3 years ago
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tiny-mole [99]

Answer:

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Step-by-step explanation:

\sqrt{\dfrac{5}{8}} =

= \dfrac{\sqrt{5}}{\sqrt{8}}

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= \dfrac{\sqrt{5}}{2 \sqrt{2}}

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= \dfrac{\sqrt{10}}{2 \times 2}

= \dfrac{\sqrt{10}}{4}

3 0
3 years ago
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