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Pachacha [2.7K]
3 years ago
14

Evaluate a + 4 when a =87​

Mathematics
1 answer:
Rainbow [258]3 years ago
3 0

Answer:

81

Step-by-step explanation:

a+4

Let a = 87

87+4

81

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Figure a is dilated by a scale factor of 1/2 to form figure b. What is the length of x?
PIT_PIT [208]

Answer:

The correct option is 3. The value of x is 8 inches.

Step-by-step explanation:

It is given that Figure A is dilated by a scale factor of 1/2 to form Figure B. It means both figure are similar and corresponding sides of similar figures are proportional.

\text{scale factor}=\frac{\text{Side of image}}{\text{Side of preimage}}

\frac{1}{2}=\frac{x}{16}

Multiply both sides by 16.

\frac{16}{2}=x

8=x

Since scale factor is 1/2, so we can directly say that the side length of image is half of the corresponding side of preimage.

The length of x is 8 inches. Therefore the correct option is 3.

3 0
4 years ago
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Answer:

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Step-by-step explanation:

A is no, b is no, c is no, d is yes and e is yes.

An integer is a whole number. D and E and -9 and 60 so that is correct.

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6 0
3 years ago
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Find the equivalent exponential expression. (72)3
sashaice [31]

Your Answer is 2*10^2 + 1*10^1 + 6*1^1

5 0
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Factor the expression using the GCF 60-150x
Novay_Z [31]

Answer:

30(2 - 5x)

Step-by-step explanation:

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A negative value of r means that:
tatuchka [14]

Answer:

(d.) Those who score high on one variable tend to score low on the other.

Step-by-step explanation:

A negative value of correlation coefficient (r) shows a relationship between two variables such that as one variable increases, the other decreases. It shows the inverse relationship between two variables with the dependence determined by the value of the correlation coefficient (r).

It can be observed that for graphs with negative slope, the correlation coefficient (r) is similarly negative. This speaks about its relationship too.

The correlation coefficient being negative doesn't mean the relationship between the two variables in question is bad, it just means that the correlation relationship is inverse (still dependent). A perfectly negative correlation is -1.  

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