4x+8 =20
- 4x + 2y = -30

Answers

Answer 1

Answer:

first one is x=3

Step-by-step explanation:


Related Questions

laura has 160 pounds of green beans at her vegetable stand. she sells 10 pounds of green beans every hour, what is the percent decrease in green beans after 3 hours?

Answers

Answer:

laura has 160 pounds of green beans at her vegetable stand. she sells 10 pounds of green beans every hour, what is the percent decrease in green beans after 3 hours?Step-by-step explanation:

Answer:

g

Step-by-step explanation:

Charlie can spend up to 10$ on lunch. He wants to buy a turkey sandwich, a bottle of soda,
and x pounds of macaroni. If a turkey sandwich cost $3.75, a bottle of soda cost $2.25, and
macaroni costs $2 per pound, find the range of pounds of macaroni that Charlie can buy.

Answers

Answer:

he can buy 2 pounds of macaroni

Step-by-step explanation:

first you add up the 3.75 and the 2.25 from the turkey and the soda. it ranges to 6 dollars. then if each macaroni pound is 2 you will be able to buy 2 pounds from the 4 dollars you have lefy

Answer:

Charlie can buy 1 or 2 pounds of macaroni

Step-by-step explanation

If we add up the cost of the turkey sandwich and the soda, we get $6.00. Charlie has $10.00 to spend, so when he buys the sandwich and soda, he will have $4.00 left to spend. If the macaroni is $2.00 per pound, then Charlie can buy 1 or 2 pounds of macaroni.

hope this helped

what is the area if b=16mm and h=12mm

Answers

Answer: 96

Step-by-step explanation: the formula for area of a triangle is 1/2 (b)(h)

so 1/2 (16)(12)

= 96

2. The angle of elevation of the top of a vertical
cliff, as seen from a boat 120 m away, is 32°.
The angle of elevation of the top of a flagpole
at the edge of the cliff, as seen from the boat,
is 37º. Find the height of the flagpole.

Answers

Answer: 15.44 m

Step-by-step explanation:

We can think this as two triangle rectangles.

In both cases, the adjacent cathetus is 120m.

When the angle is 32°, the opposite cathetus will be the height of the cliff.

When the angle is 37°, the opposite cathetus will be the heigth of the cliff plus the height of the flagpole.

Then we need to compute both of them and calculate the difference.

We can use the trigonometric relation:

Tan(θ) = (opposite cathetus)/(adjacent cathetus)

in this case we have:

Tan(32°) = (height of the cliff)/(120m)

Tan(32°)*120m = height of the cliff = 74.98m

Now we can use the other angle to compute:

Tan(37°) = (heigth of the cliff + heigth of the flagpole)/120m

Tan(37°)*120m = heigth of the cliff + heigth of the flagpole = 90.42m

Then the height of the flagpole will be:

H = 90.42m - 74.98m = 15.44 m

Which of the following quadrilaterals are similar?

Answers

Answer:

I believe its the last one

Answer:

the last one.

Step-by-step explanation:

If two lines are perpendicular, what must be true about the slopes of the two lines. Select all that apply.

.

slopes are the same

Slopes are reciprocals

Slope are whole values

Slopes are opposites (one positive and one negative)

Answers

Answer:

Concept: Linear Systems

Those that are parallel have equal slope, contrary those that are parallel have reciprocal. Hope this helps!

Evolution requires at molecules and atoms
assemble themselves into what order​

Answers

Answer:

Evolution requires at molecules and atoms assemble themselves into increasing order

I want to know what is the formula for an endpoint with the midpoint of a line segement.

Answers

Answer:

Did u actually need the answer or is this another c.hat?

Step-by-step explanation:

I’ll mark you brainlist I’ll mark you brainlist

Answers

Answer:

-2

Step-by-step explanation:

:)

-2 , i believe it would be -2

Tony wants to buy a new iPad mini for his birthday. A brand new iPad mini has a regular price
of $399. If Tony buys the iPad today, he will receive 20% off the original price. Find the
discount and the sale price of the iPad mini.

Answers

Answer:

319.20

Step-by-step explanation:

399×20%=79.8

399 - 79.8= 319.20

rewrite the expression below in exponential form
log2 ^0.125=-3

Answers

Answer: 2^-3 = 0.125

Step-by-step explanation:

Just took a test over it :)

Sal's Sandwich Shop sells wraps and sandwiches as part of its lunch specials. The profit on every sandwich is $2 and the profit on every wrap is $3. Sal made a profit of $1,470 from lunch specials last month. The equation 2x + 3y = 1,470 represents Sal's profits last month, where x is the number of sandwich lunch specials sold and y is the number of wrap lunch specials sold.
Below is a graph that represents the total profits for a third month. Write the equation of the line that represents this graph. Show your work or explain how you determined the equations.

Answers

Answer:

y = -2/3x + 300

Step-by-step explanation:

Since the line is linear, we can find the equation of the line in y=mx+b form.

First, you have to find the slope using the slope formula.  Pick two points from the graph and plug it into the equation.  It doesn't matter which ones; you will get the right answer regardless.  I picked the points (0, 300) and (450, 0).

[tex]m=\frac{y_{2} -y_{1} }{x_{2} -x_{1} }\\m=\frac{300 -0 }{0 -450 }\\m=\frac{300}{-450} \\m=-\frac{2}{3}[/tex]

You now have slope (m).  You have to find the y-intercept (b) next.  The y-intercept is the point where the line crosses the y-axis.  For this graph, the line crosses the y-axis at (0, 300), making the y-intercept 300.

Since you have m and b, you can plug the values into y=mx+b.

y = mx + b

y = -2/3x + 300

What is the solution of -8≤-2x≤6

a) -4<x<3
b) -4≤x≤3
c) -4≥x≥3
d) -3≤x≤4​

Answers

Pretty sure the answer is D :)

can someone solve -15 = - 7a - 4 - 4a

and m - 4m = -6

and 8v - 3 + 3v = 8

STEP BY STEP PLEASE.

Answers

Answer:

A=1, m=2, v=1

Step-by-step explanation:

A.

[tex]-15=-7a-4-4a\\\\-15+4=-11a-4+4\\\\-11=-11a\\\\a=1[/tex]

B.

[tex]m-4m=-6\\\\\\-3m=-6\\\\\\3m=6\\\\m=2[/tex]

C.

[tex]8v-3+3v=8\\\\11v-3=8\\\\11v-3+3=8+3\\\\11v=11\\\\v=1[/tex]

For A, I first subtracted -4 from -7 as their variables are the same. I cannot subtract integers from variables. Then, I added 4 on both sides to move the integer on the left side. (This would also remove the -4 on the right side because -4+4=0) Then I divided -11 by both sides to get 1a or a.

For B, I  subtracted -4 from 1 as their variables are the same. This time, since they are both negative numbers, I can make them both positive. So, just divide 3 by both sides as we want to get 1m.

For C, Add 3 to 8 as v is their variable. Then, I added 3 to both sides because we want to get the variable on one side. Divide by 11 and you will get v=1.

Solve for x.
(x + 13) ft
24 ft

Answers

Answer:

x = 9.

Step-by-step explanation:

If you meant (x + 13) = 24, then we first must subtract 24 by 13.

24 - 13 = 9

Now, check your work by replacing the "x" with 9.

(9+ 13) = 24

24 = 24 <----- This is a true statement.

Therefore, x = 9.

Hope this helps! :D

Can someone solve these by elimination?

Answers

Answer:

x=1 and y=2 for number 4

Step-by-step explanation:

Games Galore Super Store buys the latest video game at a wholesale price of $30.00. The markup rate at Game's Galore Super Store is 40%. You use your allowance to purchase the game at the store. How much will you pay, not including tax and explain your reasoning. *

Answers

Answer:

$42

Step-by-step explanation:

By definition, Markup is the difference between a product's selling price and cost as a percentage of the cost.

For example, if a product sells for $125 and costs $100, the additional price increase is ($125 – $100) / $100) x 100 = 25%.

Given data

firstly let us solve for 40% of $30

=40/100*30

=0.4*30

=$12

therefore the sale price will be the markup rate plus the initial price

Hence the you will have to pay 12+30=$42

Question 3 of 8 Which of the symbols correctly relates the two numbers below? Check all that apply. 19 ? 20

A.=/

B. =

C. <_

D. >_

E. >

F. <​

Answers

Answer:

a and d

Step-by-step explanation:

it has a ratio comparison

what’s the slope of the line?

Answers

Answer:

(0,0)

Step-by-step explanation:

3x– 2y = -3
y = 7 - 4x
Resolver por sustitución

Answers

Answer:

y= 3/2x+3/2 btw add these and that is your answer then y=-4

Step-by-step explanation:

Cindy has a picture that is 3 inches wide and 4 inches long. She wants to enlarge it so that it is 12 inches long. How wide will the picture be?

Answers

Answer:

9 inches wide

Step-by-step explanation:

What we know:

Cindy has a 3-inch by 4-inch picture.

She wants to enlarge that picture so the length is 12 inches.

It's 4 inches long in the original, and 12 inches in the scale.

Divide 12 by 4 to get a scale factor of 3.

Multiply 3 by 3 (essentially 3^2) to get 9 inches as the width.

Brainlest if correct

Answers

I believe that the answer is B

Use the equation p=b-3 to find the value of p when b = 8

Answers

Answer:

5

Step-by-step explanation:

p=(8)-3

p=5

Answer:

p=8-3

p=5

Step-by-step explanation:

Manny makes dinner using 1 box of pasta and 1 jar of sauce. If pasta is sold in packages of 10 boxes and sauce is sold in packages of 2 jars, what is the least number of dinners that Manny can make without any supplies leftover?

Answers

Answer:

10 dinners

Step-by-step explanation:

We solve using the Least Common Multiple Method.

We are told:

Pasta is sold in packages of 10 boxes Sauce is sold in packages of 2 jars.

We find the Multiples of 2 and 10

Multiples of 2:

2, 4, 6, 8, 10, 12, 14

Multiples of 10:

10, 20, 30

Therefore,

LCM(2, 10) = 10

The least number of dinners that Manny can make without any supplies leftover is 10 dinners

( HELP PLEASE <3)
a person riding in an elevator travels 150 feet in 30 seconds. What equation represents this relationship? How many feet will the person travel on 10 seconds?

A.) y=5x;5 feet
B.) y=3x;30 feet
C.) y= 1/5x;2 feet
D.) y=5x;50 feet

Answers

The answer is B like May Duh

Answer:

The answer is A

Step-by-step explanation:

If you divided by 150/30 = 5.

So the answer is A. y=5x;5 feet.

y = 4x 2 is shifted 5 units to the right

Answers

Answer:4

Step-by-step explanation: y=mx+b is the slope intercept form of an equation. m is the slope and b is the y-intercept. just substitute 4 for m and 2 for b and get the original equation y = 4x + 2. since 4 is m, then 4 is the slope.

Answer:

y= 4(x-5) 2

Step-by-step explanation:

It seems counterintuitive, but to shift a parabola, you have to subtract five from x. To shift to the left, you would simply add five to x instead of subtract.

5/8 divided by 1 1/3? In fraction form

Answers

Answer:

15/32

Step-by-step explanation:

15/32 is the fraction form of the statement 5/8 divided by 1 1/3.

To divide 5/8 by 1 1/3, we first need to convert the mixed number 1 1/3 to an improper fraction.

1 1/3 can be written as (3/3 + 1/3), which simplifies to 4/3.

Now, we can rewrite the division as the multiplication of the dividend by the reciprocal of the divisor:

(5/8) * (3/4)

Multiplying the numerators and denominators:

(5 * 3) / (8 * 4) = 15/32

Therefore, 5/8 divided by 1 1/3 in fraction form is equal to 15/32.

Learn more about ratios here:

https://brainly.com/question/13419413

#SPJ6

solve the system of equations
y=-2/3x+1 and x+y=4

Answers

Answer:

Point form: (9,-5)

Step-by-step explanation:

y=-2/3x+1 and x+y=4

Point form: (9,-5)

Equation form: x = 9, y = -5

A circular region has a population of about 250,000 people and a population density of about 125 people per square mile. Find the radius of the
region. Round your answer to the nearest hundredth.
The radius of the region is about
miles

Answers

Answer:

2.5 km

Step-by-step explanation:

Pls help, my moms gonna tell if i fail

Answers

Answer:

0 and 3, I think those are the answers cause they make the most sense

Step-by-step explanation:

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