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DanielleElmas [232]

3 years ago

15

Does (-3, -7) make the equation y = 4x + 5 true?

1 answer:

choli [55]3 years ago

5 0

Answer: Yes. True

Step-by-step explanation:

In (-3, -7) , -3 is x and -7 is y.

Now, put those values in the equation.

y = 4x + 5

-7 = (4×-3)+5

-7 = -12 + 5

-7 = -7, which is true

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The current temperature is 48°F. It is expected to drop 1.5°F each hour.

Lostsunrise [7]

Answer:

B

Step-by-step explanation:

5 0

1 year ago

Find the missing side lengths. Leave your answers as radicals in simplest form. Please help!! Due today

Nataly_w [17]

Answer:

$m = 10\sqrt 3$

$n = 10$

Step-by-step explanation:

Required

Find m and n

Considering the given angle, we have:

$\sin(60) = \frac{Opposite}{Hypotenuse}$

This gives:

$\sin(60) = \frac{m}{20}$

Make m ths subject

$m = 20 * \sin(60)$

$\sin(60) =\frac{\sqrt 3}{2}$

So, we have:

$m = 20 *\frac{\sqrt 3}{2}$

$m = 10\sqrt 3$

Considering the given angle again, we have:

$\cos(60) = \frac{Adjacent}{Hypotenuse}$

This gives:

$\cos(60) = \frac{n}{20}$

Make n the subject

$n = 20 * \cos(60)$

$\sin(60) =\frac{1}{2}$

So, we have:

$n = 20 *\frac{1}{2}$

$n = 10$

5 0

2 years ago

What value of B makes the expression. x² + Bx + 81 a perfect square trinomial?

Oxana [17]

Answer:

B.) 18

Step-by-step explanation:

To find the correct b value we use this formula

b² - 4ac = 0

b = What we are solving for

a = 1

c = 81

b² - 4(1)(81) = 0

b² - 324 = 0

b² = 324

$b = \sqrt{324}$

b = ±18

And 18 is one of the answer choices

So B.) 18 is the correct answer.

4 0

2 years ago

Read 2 more answers

State the coordinate of the image of the given point B (-10,-6) under a dilation with center at the origin

nignag [31]

Answer:

C

Step-by-step explanation:

1/2 is basically like dividing by 2

5 0

2 years ago

Express 2/3 in minutes

Yuliya22 [10]

To find 2/3 of an hour first we will divide 1 hour that is 60 mins into 3parts so we will get 20 mins.

5 0

2 years ago