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3 years ago

Which of the following are solutions to the equation below (5x+1)^2=7? Check all that apply.

Mathematics

2 answers:

Dahasolnce [82]3 years ago

8 0

Answer:C E (apex) !!

Step-by-step explanation:

stiv31 [10]3 years ago

4 0

(5x+1)² = 7; expand: 25x² + 10x +1 = 7 or 25x² + 10x -6 = 0

Solve this quadratic for x:

x = [-b + √(b² - 4ac)]/2a and x = [-b - √(b² - 4ac)]/2a
Plug the values and you'll find :
x = (- √7 - 1)/5 (answer C)
x = (+√7 -1)/5 (answer E)

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statuscvo [17]

Answer:

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Step-by-step explanation:

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4 years ago

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Find the slope of the line. On a coordinate plane, a line goes through (0, negative 2) and (2, negative 4). a. -1 c. -2 b. 2 d.

RSB [31]

Answer:

m = -1 (answer (a))

Step-by-step explanation:

Recall that the slope of a straight line is m = rise / run.

As we go from the point (0, -2) to the point (2, -4), we see an increase of 2 in x and a decrease of 2 in y.

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3 years ago

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Show how you can use repeated subtraction to find 84 divided by 6

Lunna [17]

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3 years ago

A recipe of salad dressing calls for ¼ cup vinegar to ⅔ cup oil. How many cups of oil are needed for each cup of vinegar?

Akimi4 [234]

Answer:

$2\frac{2}{3} \ cups$ of oil are needed for each cup of vinegar.

Step-by-step explanation:

Given:

A recipe of salad dressing calls for ¼ cup vinegar to ⅔ cup oil.

Now, to find the cups of oil are needed for each cup of vinegar.

So, we solve by using unitary method:

If $\frac{1}{4}$ cup of vinegar is needed for oil of $\frac{2}{3}$ cup.

So, 1 cup of vinegar is needed for oil of = $\frac{2}{3} \div\frac{1}{4}$

= $\frac{2}{3}\times 4$

(the fractions turns reciprocals as the division changes into multiplication)

= $\frac{8}{3}$

= $2\frac{2}{3}$ cups.

Therefore, $2\frac{2}{3} \ cups$ of oil are needed for each cup of vinegar.

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3 years ago

A class of 33 students elected a class treasurer. There were 11 votes for Candidate A and 15 votes for Candidate B. The remainin

katrin [286]

Answer:

$\frac{11}{11+15}$ * 100

Step-by-step explanation:

The voters would be 11+15 and since there were 11 votes for A, that is the equation you should use.

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3 years ago