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3 years ago

Help! this is urgent!

Mathematics

2 answers:

arsen [322]3 years ago

6 0

Answer:

81 is the perfect square of the first option

Step-by-step explanation:

It is asking for the perfect square so the third option will be eliminated because that is cubed.

The fourth option will also be eliminated because it is multiplication.

The second option will be eliminated because it has addition.

81 is the perfect square of the first option

Hope this helps!

bagirrra123 [75]3 years ago

3 0

Answer:

Step-by-step explanation:

because if you put A into a calculator it equals 81.

hope this helps

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The points , (−15,1) and , (−7,r) lie on a line with slope 5/4. Find the missing coordinate r. Click image to enlarge

Nadya [2.5K]

The missing coordinate r is 11.

Solution:

Given points are (–15, 1) and (–7, r).

$x_{1}=-15, x_{2}=-7, y_{1}=1 \text { and } y_{2}=7$

Slope (m) = $\frac{5}{4}$

To find the missing coordinate r:

Slope formula:

$m=\frac{y_{2}-y_{1}}{x_{2}-x_{1}}$

Substitute the given values in the formula.

$$\frac{5}{4}=\frac{r-1}{-7-(-15)}$

$$\frac{5}{4}=\frac{r-1}{-7+15}$

$$\frac{5}{4}=\frac{r-1}{8}$

Do cross multiplication.

$8 \times 5=4(r-1)$

40 = 4r – 4

Add 4 on both side of the equation.

44 = 4r

Divide by 4 on both side of the equation.

11 = r

⇒ r = 11

Hence the missing coordinate r is 11.

6 0

3 years ago

What is the best approximation for the circumference of a circle with a diameter of 300 ft?

geniusboy [140]

Hello!

$\bf Answer$

The best approximation for the circumference is $\boxed{ \bf 942~ft.}$

______________________________________________________

$\bf Explanation$

c = 2 $\pi$ r

r = 300 ÷ 2

r = 150

c = 2 × 3.14 × 150

c = 942

6 0

3 years ago

Read 2 more answers

Which properties did Marty use? Thank you very much!!

nadezda [96]

Answer:123

Step-by-step explanation:

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3 years ago

Solve. 4×[52×(3×15)+32]-5=

worty [1.4K]

Answer: 9483

Step by step

= 4(52)(45)+32)−5

= 4(2340+32)−5

= (4)(2372)−5

= 9488–5

= 9483

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3 years ago

Kate Alexander worked 40 hours last week. Her pay rate is $8.50 per hour. Assuming 7.65% social security withholding, how much s

Harman [31]

The answer is 40*8.50 * 7.65/100 = 26.01 and that's your answer

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3 years ago