4 years ago

How do mental math strategies help you solve problems such as the ones above?

1 answer:

7 0

With mental math, you can perform equations quickly and efficiently. They also help you to develop your own strategies and solve more complex math equations. Hope this helps;)

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150 is 25% of what number? Four students solved this problem using equivalent ratios. Choose the student whose work is correct.

jenyasd209 [6]

Answer:

liam's answer is correct

Step-by-step explanation:

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3 years ago

Read 2 more answers

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Phantasy [73]

-2(-2)^4 + 5(-2)^2 - 4

-2(-2)= 4. 4^4= 16

5(-2)= -10. -10^2= 100 - 4= 96

96 + 16= 112

Answer: 112

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4 years ago

Two grocery stores are having deals on tomatoes. Sally's Grocery is selling 10 tomatoes for $6.30. Sweet Supermarket is selling

iragen [17]

Answer:

Step-by-step explanation:

Calculate price per unit:

7/5.10= $1.37

So the answer is the store selling 10 tomatoes for $6.30 is the lower unit price

The tomoatoes if they were sold at Sally’s instead would cost $4.41

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3 years ago

Value<br>5. What per cent of 84 is 14?

galben [10]

14/84 x100 =. 1/6 x 100 = 16.66%

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3 years ago

Ethan is watching a satellite launch from an observation spot 1 mile away. Find the angle of elevation from Ethan to the satelli

Thepotemich [5.8K]

Answer:

$\theta=80.53^{\circ}$

Step-by-step explanation:

From the attached figure, AB is the height of the satellite and the distance between Ethan and the ground is 1 mile.

We can find the angle of elevation from Ethan to the satellite using trigonometry as follows :

$\tan\theta=\dfrac{P}{B}\\\\\tan\theta=\dfrac{6}{1}\\\\\theta=\tan^{-1}(6)\\\\\theta=80.53^{\circ}$

So, the angle of elevation is 80.53 degrees.

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3 years ago