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3 years ago

Use the distributive property to simplify 7(2a + 5).

Mathematics

2 answers:

CaHeK987 [17]3 years ago

6 0

If you are using the distributive property, you would multiply 7*2a+&*5= 14a+35

tangare [24]3 years ago

3 0

Distribute and Multiply
14a+35

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Step-by-step explanation:

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3 years ago

The temperature of a weather station was 12.8 °F at midnight and fell 1.4 °F each hour for six hours. Which of the following sol

Len [333]

Answer:

Let's try to find a linear relation like:

T(h) = a*h + b

where a is the slope and b is the y-intercept.

h is the number of hours after midnight.

T is the temperature at the time defined by h.

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At midnight, we have h = 0, then:

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b = 12.8°F

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Then the slope will be -1.4°F

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2 years ago

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Maru [420]

Answer:

B. d = 5/3t

Step-by-step explanation:

The complete question is shown in the figure attached with.

We need to find the equation of direct variation using the graph. The general equation for a direction variation is:

y = kx

In this case, the variable along x axis is time in seconds i.e. "t" and the variable along y axis is distance in meters i.e. "d". So, the equation for this case would be:

d = kt

We need to find the value of "k" to complete this equation. For this we can use any point from the graph and substitute it in the above equation. From the graph we can see that the distance covered for time = 3 seconds is 5 meters. Substituting t =3 and d = 5 in above equation, we get:

5 = 3k

k = 5/3

Using the value of k in the above equation, we get:

$d=\frac{5}{3}t$

Therefore, option B gives the correct answer

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3 years ago

A number is between 50 and 55. It has prime factors of 2, and 9. What is the number?

mihalych1998 [28]

Answer:

The answer is 54.

Step-by-step explanation:

54 divided by 2 will give you 27.

54 divided by 9 will give you 6.

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3 years ago