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Sedaia [141]
4 years ago
8

Rewrite the expression 7 to the -2 power

Mathematics
2 answers:
liberstina [14]4 years ago
8 0

Answer:

(7)^-2

Step-by-step explanation:

hope this helps

iris [78.8K]4 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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Question 4 fast please
Daniel [21]

Answer:

X=-10

Step-by-step explanation:

Collinear points are points on the same line.

Use the equation of gradient to find the gradient. Then use the gradient to find X

\frac{Y2-Y1}{X2-X1}=Gradient  of a slope

\frac{2-(-4)}{3-0}=\frac{2+4}{3}=\frac{6}{3}=2

\frac{x+4}{-3-0}=2

Multiply both sides of the equation to get rid of the fraction.

\frac{x+4}{-3}*-3 =2*-3

x+4=-6

x=-6-4

x=-10

7 0
3 years ago
Please help me to do this question with steps
Anarel [89]

Answer:

x = 71°

Step-by-step explanation:

Segments of tangents from the same external point are congruent, that is

AT = BT

Then Δ ABT is isosceles with base angles congruent , so

x = \frac{180-38}{2} = \frac{142}{2} = 71°

8 0
3 years ago
The terminal side of an angle θ in standard position is in quadrant 1. If sinθ=0.8, find cosθ.
Aloiza [94]

Answer:

cos\theta=\frac{3}{5}

Step-by-step explanation:

Since sin\theta=0.8 is the same as sin\theta=\frac{4}{5} and sin\theta=\frac{opposite}{hypotenuse}, then we know that the side opposite to the angle \theta is 4 units and the hypotenuse is 5 units.

Because cos\theta=\frac{adjacent}{hypotenuse}, then we have to find the adjacent side to the angle \theta using the Pythagorean Theorem:

a^2+b^2=c^2\\\\(adjacent)^2+(opposite)^2=(hypotenuse)^2\\\\(adjacent)^2+4^2=5^2\\\\(adjacent)^2+16=25\\\\(adjacent)^2=9\\\\adjacent=3

Therefore, since the adjacent side is 3 units, then cos\theta=\frac{3}{5}

7 0
3 years ago
Write 6,000,370 in scientific notation.
adell [148]
First count the number of digits after the first one 6  This = 6 and is the exponent of 10  so the required notation is

6.000370 * 10^6
4 0
3 years ago
Read 2 more answers
Assume that all​ grade-point averages are to be standardized on a scale between 0 and 6. How many​ grade-point averages must be
yanalaym [24]

Answer:

The sample size 'n' = 72,030

Step-by-step explanation:

<u>Step(i):-</u>

<em>Given that the Estimate Error = 0.013</em>

<em>Given that the standard deviation of the Population = 1.5</em>

<em>The estimated error is determined by </em>

<em />E = \frac{Z_{0.98} S.D }{\sqrt{n} }<em />

<u><em>Step(ii):-</em></u>

<em>Given that the Level of significance = 0.98 or 0.02</em>

<em>Z₀.₀₂ =   2.326</em>

<em>The estimated error is determined by </em>

<em>         </em>E = \frac{Z_{0.98} S.D }{\sqrt{n} }<em />

<em>    </em>0.013 = \frac{2.326 X 1.5 }{\sqrt{n} }<em />

<em>       </em>\sqrt{n} = \frac{3.489}{0.013} = 268.38<em />

<u><em>Squaring on both sides, we get</em></u>

<em>     n =  72,030</em>

<u><em>Final answer:-</em></u>

The sample size 'n' = 72,030

7 0
3 years ago
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