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3 years ago

Mary multiplied a number by -3. When she added the result to 6, she got 12. What is her number?

Mathematics

1 answer:

ipn [44]3 years ago

5 0

X×-3+6=12, -3×=12-6, -3x=6 |÷-3, x=-2

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For this exponential function, what is the output value, when the input value is 2?

qwelly [4]

Answer:

20.

Step-by-step explanation:

You plug two into the exponent with the base two

$y=5 times 2^2\\y=5 times 4\\y=20$

6 0

3 years ago

Determine the values of A,B, and C when y-7=3(x+4)

Alja [10]

Answer:

y= 3x + 19, x E R

Step-by-step explanation:

y - 7 = 3 (x + 4)

(distribute the 3 through the parentheses)

y= 3x + 12 + 7

(add the numbers)

y = 3x + 19

(write the solution/answer Y in parametric form)

y = 3x + 19, x E R

3 0

3 years ago

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AVprozaik [17]

Answer:

15 square feet

Step-by-step explanation:

Multiply 1.5 by 3 which equals 4.5

Multiply 1.5 by 2 which equals 3

Add the above answers (4.5 plus 3)

Then multiply by 2 (7.5 times 2)

It equals 15

3 0

3 years ago

F(x) = -4x2 + 5x<br> Find f (6)

mina [271]

You would plug in 6 where the x is so it would be -4 times 2 plus 5(6)

7 0

3 years ago

On a map, the scale shown is 1 inch: 20 miles. If a city is 900 square miles, what is the area of the city on the map?

WITCHER [35]

Answer:

2.25 square inches

Step-by-step explanation:

we know that

The scale is $1\ inch: 20\ miles$

That means

1 inch on a map represent 20 miles in the city

An area of $(1)(1)=1\ in^2$ on a map represent an area of $(20)(20)=400\ mi^2$ in the city

Applying proportion

$\frac{1}{400}\ \frac{in^2}{mi^2}=\frac{x}{900}\ \frac{in^2}{mi^2}\\\\x=900/400\\\\x=2.25\ in^2$

3 0

3 years ago