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Sedaia [141]
3 years ago
8

Rewrite the expression 7 to the -2 power

Mathematics
2 answers:
liberstina [14]3 years ago
8 0

Answer:

(7)^-2

Step-by-step explanation:

hope this helps

iris [78.8K]3 years ago
5 0

Answer:

1/49

Step-by-step explanation:

7^-2

1/49

7^2 is usually 49 for negative exponents just flip it

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Cube root of b to the 12 power​
kvv77 [185]

\sqrt[3]{b^{12}}=\sqrt[3]{(b^4)^3}=b^4

6 0
3 years ago
If x-y =8 find the value of y when x=3
DedPeter [7]
Answer: y = -5

Substitute in 3 for x.
x - y = 8                            Substitution
3 - y = 8                            Subtract 3 from both sides
-y = 5                                Divide by -1 to both sides
y = -5                                Answer!

You can also check your work.
x - y = 8       
3 - (-5) = 8                  
3 + 5 = 8                        
8 = 8                                

8 0
3 years ago
150 adults complete a survey 80 are women write the ratio men:women in its simplest form
noname [10]
7:8 is the ratio of men:women
6 0
3 years ago
Read 2 more answers
Simplify 3x + 5 + 7 x - 3 - x + 2​
stira [4]

Before we do this problem, let's go over a little algebra terminology.

The number in front of your variable is called your <em>coefficient </em>and notice that the <em>x</em> at the end of the problem does not have a coefficient.

When that happens, when there is no number in front of your variable, you can put a 1 there to fill that position. So -x can be thought of as -1x.

Next let's change all our minus signs to plus negatives.

So the problem reads 3x + 5 + 7x + -3 + -1x + 2.

Now let's simplify this by combining like terms.

We can combine our "x" terms first.

3x + 7x + -1x simplifies to +9x.

Now, 5 + -3 + 2 simplifies to 4.

So our answer is 9x + 4.

8 0
2 years ago
Read 2 more answers
Suppose that the prevalence of a certain type of tree allergy is 0.26 in the general population. If 100 people randomly chosen f
laiz [17]

Answer:

0.0906

Step-by-step explanation:

Given that the prevalence of a certain type of tree allergy is 0.26 in the general population

X- the no of persons having tree allergy is binomial since each persons is independent of the other and there are two outcomes.

Here n = 100

Required probability = the probability that exactly 26 of them will have this allergy

=P(x=26)=100C26(0.26)^{26} (1-0,26)^{100-26}\\ =0.09063\\=0.0906

4 0
3 years ago
Read 2 more answers
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