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3 years ago

13

What is 20% of 80 I need help

2 answers:

sergey [27]3 years ago

8 0

Answer:

16 is 20 percent out of 80

Step-by-step explanation:

Pie3 years ago

3 0

Answer:

16

Step-by-step explanation:

20% = 0.2

80 x 0.2 = 16

Please mark me Brainliest :)

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What is the value of this expression when x= -6 and y = -1/2? 4(x2 + 3) - 2y?

ladessa [460]

the answer is A

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3 years ago

HEY GUYS HELP, ILL MARK YOU BRAINLY !

Serjik [45]

Y=40x+100 and the second question is y=1.69x

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3 years ago

This table gives a few (x,y)(x,y)left parenthesis, x, comma, y, right parenthesis pairs of a line in the coordinate plane. -28 -

Serhud [2]

Answer:

The y-intercept is y = 2

Step-by-step explanation:

A linear function has the following format:

$y = mx + b$

In which m is the slope and b is the y-intercept, which is the value of y when x = 0.

We are given these three points:

(-28, -54)

(-21, -40)

(-14, -26)

We use two of them to build a system, to find values for m and b.

(-28, -54)

This means that when $x = -28, y = -54$

So

$y = mx + b$

$-54 = -28m + b$

$28m = b + 54$

$m = \frac{b + 54}{28}$

(-21, -40)

This means that when $x = -21, y = -40$

So

$y = mx + b$

$-40 = -21m + b$

$-40 = -21\frac{b + 54}{28} + b$

$-40 = \frac{-21b - 1134 + 28b}{28}$

$7b - 1134 = -40*28$

$7b = 14$

$b = \frac{14}{7}$

$b = 2$

The y-intercept is y = 2

7 0

3 years ago

64,-48,36,-27 which formula can be used to describe the sequence

ryzh [129]

Answer:

see explanation

Step-by-step explanation:

These are the terms of a geometric sequence with n th term formula

$a_{n}$ = a $(r)^{n-1}$

where a is the first term and r the common ratio

r = $\frac{-48}{64}$ = $\frac{36}{-48}$ = - $\frac{3}{4}$

the first term a = 64, hence

$a_{n}$ = 64 $(-3/4)^{n-1}$

6 0

4 years ago

Solve for x. Round to the nearest tenth of a degree, if necessary.

MissTica

Answer:

x ≈ 54.8°

Step-by-step explanation:

Using the tangent ratio in the right triangle

tan x = $\frac{opposite}{adjacent}$ = $\frac{PQ}{QR}$ = $\frac{7.1}{5}$ , then

x = $tan^{-1}$ ( $\frac{7.1}{5}$ ) ≈ 54.8° ( to the nearest tenth )

4 0

3 years ago