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4 years ago

What is an equivalent expression for 7times plus 56.

Mathematics

2 answers:

Travka [436]4 years ago

8 0

Ifs you could put it in a easier statement than that would be easier like 7x + 56
Anyway, here is the answer.
7(x + 2³)

krok68 [10]4 years ago

7 0

<em>t would be 8 if you are multiplying .</em>

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-5+(-3).I know the answer is -8 but how because a negative plus a negative is a positive.

ira [324]

Answer:

“two negatives = positive” rule works for multiplication and division.

Step-by-step explanation:

-5 + (-3) example

imagine a number line with 0 in the center. From (0) You move left 5 places to (-5) on the number line. Now you move another 3 more to the left (-3) and land on (-8).

You are combining the negatives. I hope this helps.

8 0

2 years ago

Evaluate tan45/sin30 . In your final answer, include all calculations.

Maslowich

From the identity $\displaystyle{ \tan x= \frac{\sin x}{\cos x}$ , and from the values:

$\sin45^{\circ}=\cos45^{\circ}= \frac{ \sqrt{2}}{2}$ ,

we have: $\displaystyle{ \tan 45^{\circ}= \frac{\sin 45^{\circ}}{\cos 45^{\circ}}= \frac{ \frac{ \sqrt{2}}{2}}{\frac{ \sqrt{2}}{2}} =1$ .

We also know that $\sin30^{\circ}= \frac{1}{2}$ .

Thus, $\displaystyle{ \frac{\tan 45^{\circ}}{\sin30^{\circ}} = \frac{1}{\frac{1}{2}}=2.$

Answer: 2

8 0

3 years ago

1/2x + 3y=4 for x when x = 6

Kipish [7]

Wouldn't it be y=1/3?

6 0

3 years ago

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I don't understand can someone explain

Tomtit [17]

This is a function when u have f(n) u plug in the number for example 1 because the number -13 is the first number in the sequence

3 0

3 years ago

Solve the equation 3(x - 7) = 42

Effectus [21]

Answer:

x=21.

Step-by-step explanation:

First you distribute 3 to the parenthesis. You should get 3x-21=42 at this point. Then you add 21 to 42 to get 63. Here you should be at 3x=63. Divide 63 by 3 to get x=3

6 0

3 years ago

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