All categories

3 years ago

Find the value of y in the equation y=-4x+9 when x=-3

Mathematics

2 answers:

Alla [95]3 years ago

7 0

Y =21
-4x-3 =12
12+9=21

Katena32 [7]3 years ago

6 0

Answer:

y = 21

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets
Parenthesis
Exponents
Multiplication
Division
Addition
Subtraction

Left to Right

Step-by-step explanation:

Step 1: Define

Identify

y = -4x + 9

x = -3

Step 2: Evaluate

Substitute in x [Equation]: y = -4(-3) + 9
Multiply: y = 12 + 9
Add: y = 21

You might be interested in

A company hauls its 1 cubic foot boxes in the truck as shown.

Alenkinab [10]

Answer:

Step-by-step explanation:

3*4*8=96

4 0

2 years ago

Read 2 more answers

A company that makes hair-care products had 3,000 people try a new shampoo of the 3,000 21 had a mild allergic reaction. What pe

Ksenya-84 [330]

Answer:

.007

Step-step explanation:

21÷3000=.007

5 0

3 years ago

matrenka [14]

Answer:

Step-by-step explanation:

D.works many year for a nation

8 0

2 years ago

PLEASE PLEASE HELP 25 POINTS I WILL MARK BRAINLIEST

Sidana [21]

Answer:

Step-by-step explanation:

(3, 9) (-3, 5)

0 is in the middle 7 is in the middle

for x: 3 2 1 0 -1 -2 -3 for y: 9 8 7 6 5

Thus, (0, 7) is the midpoint between (3, 9) and (-3, 5)

6 0

2 years ago

Two cars travel at the same speed to different destinations. Car A reaches its destination in 17 minutes. Car B reaches its dest

Goryan [66]

Answer:

speed of car A =Speed of car B=0.8 miles/minutes.

Step-by-step explanation:

We are given that speed of car A is equal to speed of car B.

Also let car A travels x miles.

and car B travels y miles.

Car A reaches its destination in 17 minutes.

this means that speed of car A is given by: $\dfrac{x}{17}$ miles/minutes ( since speed is defined as the ratio of distance and time).

Car B reaches its destination in 32 minutes.

This means that the speed of car B is given by: $\dfrac{y}{32}$ miles/minutes

as speed of both cars are equal this means:

$\dfrac{x}{17}=\dfrac{y}{32}$ ------(1)

Also we are given Car B travels 12 miles farther than Car A.

this means $y-x=12$

$y=12+x$ ------(2)

on using equation (1) and (2) we have:

$\dfrac{x}{17}=\dfrac{12+x}{32}\\ \\32x=17(12+x)\\\\32x=17\times12+17x\\\\32x-17x=17\times12\\\\15x=122\times17\\\\x=13.6$

Hence the speed of car A is 0.8 miles/minutes ( since x/17 is the speed of car A)

Speed of car B=0.8 miles/minutes.

8 0

3 years ago