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Nataly_w [17]
3 years ago
5

If x2 = 40, what is the value of x? (3 points) 1) +80 2) +20 3) ανθο 4) 1940

Mathematics
1 answer:
Liula [17]3 years ago
3 0

Answer:

(2) 20

Explanation:

x2 = 40

Divide Both Sides By 2

x2 / 2 = 40 / 2

x = 20

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If y is directly proportional to x square and y equal 1/8 when x = 1/2 what is the positive value of x when y it was 9/2?
mojhsa [17]

Answer:

d

Step-by-step explanation:

Given y is directly proportional to x² then the equation relating them is

y = kx² ← k is the constant of proportion

To find k use the condition y = \frac{1}{8} when x = \frac{1}{2}, then

\frac{1}{8} = k(\frac{1}{2} )² = \frac{1}{4} k ( multiply both sides by 8 )

1 = 2k ( divide both sides by 2 )

k = \frac{1}{2}

y = \frac{1}{2} x² ← equation of proportion

When y = \frac{9}{2} , then

\frac{9}{2} = \frac{1}{2} x² ( multiply both sides by 2 )

9 = x² ( take the square root of both sides )

x = ± \sqrt{9} = ± 3

with positive value x = 3 → d

8 0
3 years ago
Mrs. Jasper has some 8-ounce cups for serving punch. Her punch bowl holds 2 gallons of punch. Mrs. Jasper thinks she can serve f
Dima020 [189]

Answer:

She is wrong

Step-by-step explanation:

in one gallon there is 128 ounces, and 2 would make it 256.

40 - 8 ounce cups would make it 320 ounces, therefore she would need 3 gallons at least.

5 0
3 years ago
In 5 - 7 complete sentences, answer all of the following question. •Use this image to respond to the following prompt: •Is the s
Law Incorporation [45]

     The line is positive because it is going upwards. The y-intercept is positive 3. It can be found by seeing where the line intercepts the y-axis. The slope of the line is 2 and it can be found by using "rise over run."

(I saw the image on another question you had asked. Have a nice day!)

5 0
3 years ago
At 11:30 a.m. the bottle is 1/4 of the way full. At what time will the bottle be 1/2 full?
attashe74 [19]

Answer:

12:00pm

Step-by-step explanation:

at 11am,the bottle is empty. the bottle fills in intervals of 1/4 every 30 minutes

4 0
3 years ago
Read 2 more answers
Evaluate (101.5)²-(100.5)²​
makvit [3.9K]

You can exploit the difference-of-squares identity,

<em>a</em>² - <em>b</em>² = (<em>a</em> - <em>b</em>) (<em>a</em> + <em>b</em>)

Then

101.5² - 100.5² = (101.5 - 100.5) * (101.5 + 100.5)

101.5² - 100.5² = 1 * 202

101.5² - 100.5² = 202

8 0
3 years ago
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