Mathematics High School

Solve equations by using elimination
-4+5y= 13
X-5y=21
( , )

Answers

Answer 1

Answer:

y=17/5 ,x= 38

Step-by-step explanation:

-4+5y =13 add 4 both side

4-4+5y=13+4

5y=17

5y/5=17/5 y=17/5

x-5y=21

x-5(17/5)=21

x-17=21

x=21+17= 38

Related Questions

please answer both of these questions

Answers

Answer:

I go for I and IV....................

Find the length of arc AB. Use 3.14 for T,
Round to the nearest tenth.
20
1 ? ]cm
Please help

Answers

Answer:

12.4 cm

Step-by-step explanation:

Length of an arc AB = [tex] \frac{\theta}{360} \times 2 \pi r [/tex]

Where,

[tex] \theta = 90 [/tex]

[tex] \pi = 90 [/tex]

r = 7.9 cm

Plug in the values

Length of an arc AB = [tex] \frac{90}{360} \times 2 \times 3.14 \times 7.9 [/tex]

[tex] = \frac{90 \times 2 \times 3.14 \times 7.9}{360} [/tex]

Length of an arc AB = 12.4 cm (nearest tenth)

Answer:

Step-by-step explanation:

answer is 12.4cm !

A caterer needs to buy 21 pounds of pasta to cater a wedding. At a store, 8 pounds of pasta cost $12. Hom much will the caterer pay for the pasta here?

All I know is how to find the unit rate but I can't figure that out.

Answers

Answer:

$31.50

Step-by-step explanation:

First you need to find out how much a single pound costs($12/8 lbs). That ends up equaling $1.50, so multiply that by 21 and you got the answer. :)

Please y'all I really need help finding out x I don't have a lot of points left.

Answers

Answer:

x = 1/2

Step-by-step explanation:

[tex] \frac{4}{7} x = \frac{2}{7} \\ \\ x = \frac{ \cancel2}{ \cancel7} \times \frac{ \cancel7}{ \cancel4 \: \: 2} \\ \\ x = \frac{1}{2} [/tex]

IfA=5 and B = 10, what is A* B equal to?
O Two
O 15
O 50
O Five

Answers

Answer:

50

Step-by-step explanation:

5x10 = 50

What is the slope in simplest form?

Answers

Answer:

-1/2

Step-by-step explanation:

The formula for slope is [ y2-y1/x2-x1 ].

We are given the points (1, 4) and (3, 3).

3-4/3-1

-1/2

Best of Luck!

Answer:

the slope equation is y2-y1/x2-x1

the points given are (1,4) and (3,3)

plug it into the equation and you get:

3-4/3-1

-1/2 is your answer. I hope this helps :)

Which table is a probability distribution table?

Answers

Answer:

Step-by-step explanation:

Table 3.

The formula for the area of a triangle is A = W. Shannon is trying to find the
base of her triangle and she is given the height and the Area. To help her work
backwards, solve the formula for the base (b).

Answers

Answer:

Did u find the answer for this

Step-by-step explanation:

The graph of p(x) = 4(x - 1)2+8 will be translated 10 units down, producing the graph of g(x).
Which equation represents the new function, 9(x)

Answers

I’m pretty sure it’s g(x) = 4(x-1)

Skies travel charges two-fifty for a plane ticket and $28 per day for rental car. For the same trip, r&r travels charges 305 for a plane ticket and 23 per day for car rental. What is the minimum number of days in martin's vacation should be or r&r travel to be a better deal for him?

Answers

Given :

Skies travel charges two-fifty for a plane ticket and $28 per day for rental car.

For the same trip, r&r travels charges 305 for a plane ticket and 23 per day for car rental.

To Find :

The minimum number of days in martin's vacation should be or r&r travel to be a better deal for him.

Solution :

Let, minimum number of days are x.

So, cost charged by Skies travel is, [tex]c_1 = 25+28x[/tex]

Cost charged by r&r travels is, [tex]c_2 = 305 + 23x[/tex]

r&r should be better deal when :

[tex]c_2 < c_1\\\\305 + 23x <25 + 28x\\\\5x >280\\\\x>56[/tex]

So, for better deal at r&r minimum number of vacation days is 57.

Hence, this is the required solution.

A coffee shop worker is putting 18 pounds of coffee into 0.25-pound bags. How many small bags of coffee can the worker make?

Answers

Answer:

72 lb bags

Step-by-step explanation:

18 / 0.25 = 72 bags :D

The answer is 72 bags. How you solve the problem is you take your first value (which is present within your problem) and divide that number by your second value (also present within your problem).

So divide 18 by 0.25.

18 / 0.25 = 72

If this isn’t correct, then I’d suggestion multiplying the values. For example:

0.25 * 18 = 4.5

Please, Solve for Y

3x - y = -13

(Correct answer gets brainliest)

Answers

Answer:

y = 13 +3x

i answered in the comments, bc it wasnt lettin me actually answer

Step-by-step explanation:

3x - y = - 13

-3x -3x

-y = -13 - 3x

divide everything by -1

y = 13 + 3x

hope this helpsss!!!

Raina makes fruit punch with 24.2 ounces of apple juice and 18.4 ounces of pineapple juice. He splits the fruit punch equally into 6 glasses.


How much fruit punch is in each glass

Answers

7.1 ounces in each glass
24.2 + 18.4
42.6

42.6/6
7.1

Each glass has 7.1 ounces of fruit punch.

Solve q + 1/7 = 1/5. Express your answer in the simplest form.

Answers

Answer:

2/35

Step-by-step explanation:

original equation:q+1/7=1/5

subtract both sides by 1/7

q=1/5-1/7

q=2/35

(give me brainly pls)

I need help asap pleaseeee

Answers

Answer: B,C

Step-by-step explanation:

Elevator A: -4x+16

Elevator B: -3x +16

ana runs 3/4 miles in 6 mins. assuming she runs at a consistent rate, what is her speed in hours?

Answers

Answer:

7.5 mph

Step-by-step explanation:

i hope this is what you needed , if so, please mark brainliest

Answer:

7.5 miles per hour

Step-by-step explanation:

An hour=60 mins

6×10=60

3/4×10=7.5

If I can read 54 pages in 3 days, how many can I read in 1 day?

Answers

Answer:

18

Step-by-step explanation:

Step 1)

54 ÷ 3 = 18

Answer:

54/3

Step-by-step explanation:

we can use crisscross multiple

What is the equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4)?
O x=-5
O X= 4
O y=-5
O y = 4

Answers

Answer:

The equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4) is x=-5

Option A is correct.

Step-by-step explanation:

We need to find equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4)

We need a line parallel to x=-2 or x+2=0 it should be of form x+k=0

We need to find k, by putting value of x=-5 as given in question the point(-5,4)

-5+k=0

k=5

So, the equation of line will be found by putting k=5:

x+k=0

x+5=0

x=-5

So, the equation of the line that is parallel to the line x = -2 and passes through the point (-5, 4) is x=-5

Option A is correct.

1- (2x+4)= 4x+5 . What is the correct solution ??

Answers

Answer:

x=4

Step-by-step explanation:

We move all terms to the left:

1-(2x+4)-(-4x+5)=0

We get rid of parentheses

-2x+4x-4-5+1=0

We add all the numbers together, and all the variables

2x-8=0

We move all terms containing x to the left, all other terms to the right

2x=8

x=8/2

x=4

Help pls lol

-4a + 16

Answers

Answer:

-4(a - 4)

Step-by-step explanation:

Two very good apps that I use for Algebra is (ill put it in the comments)

hope this helps!!!

it won't let me put the link. im sorry.

Answer:

12

Step-by-step explanation:

12

please help me i don't get it

Answers

angle 2 is 40 degrees since its a right angle and 90-50=40

Yo can anybody please help me with this math question please

Answers

Answer:

the answer should 60°

Step-by-step explanation:

if look at angle pq and rq the measure of the angle is 60° if u were to spin that angle to a u should get the same measurement

5
Find the value of x. Show your work.

Answers

Answer:

x = 10

Step-by-step explanation:

well all three angles would equal 180 in a triangle

6x - 6 + 7x + 1 + 55 = 180

combine terms

13x + 50 = 180

13x = 130

x = 10

What is the equation of this line in slope intercept form? 2x+y=−19

y=−2x−19

y=2x+19

y=2x−19

y=−2x+19

Please help

Answers

Isolate y by subtracting 2x from both sides
Your answer is: y= -2x-19

(Need help ASAP)
How many solutions does the equation have:
3x - 5 = -5 + 3x

Answers

Answer:

Infinitely many

Step-by-step explanation:

Add 5 to both sides and subtract 3x on both sides. that results in 0=0. if the numbers are the same, than its infinitely many.

Answer:

0=0

Step-by-step explanation:

3x-5=-5+3x

0=0

What triangle is congruent to KLM? A. GJH B. CBA C. FDE D. None

Answers

Option A is correct.

The triangle GJH is congruent to the triangle KLM. The correct option is A.

What is congruency?

In geometry, two figures or objects are said to be congruent if their shapes and sizes match, or if one is the mirror image of the other. The meaning of congruency is that the two shapes are similar as well as equal in size.

Given that, on a coordinate plane, there are different triangles.

The triangle GJH is congruent to the triangle KLM because the sides of the triangle are exactly equal.

KL = HJ

KM = HG

ML = JH

Therefore, the triangle GJH is congruent to the triangle KLM. The correct option is A.

To know more about congruency follow

brainly.com/question/2938476

#SPJ5

write sin x° in terms of the cosine

Answers

Answer:

cos[tex](x-\frac{\pi}{2})[/tex]

Step-by-step explanation:

If you insists that sine and cosine should be of the same angle use Pythagorean identity. Otherwise you can use identity sin(x) = cos[tex](x-\frac{\pi}{2})[/tex]

Hope this helps! :)

Please help fast!! 15 points!! Will give brainliest!!

Which inequality is shown in this graph?

a. y ≥ 3x + 3
b. y ≤ -3x + 3
c. y ≤ 3x + 3
d. y ≥ -3x + 3

Answers

Answer:

B

Step-by-step explanation:

The four members of the "Fantastic Four" made 40 cookies each for the bake sale. They know that 35% of their cookies are chocolate chip.

How many chocolate chip cookies were made?

Answers

Answer:

54% I think and if im wrong im so sorry.

Step-by-step explanation:

Solve for A
Exact (no rounding, no calculator needed)

0 = A^2 + 13A + 36

Answers

Answer:

-4 or -9

Step-by-step explanation:

-a^2-13a-36=0

(-a-4)(a+9)=0

-a-4=0

a+9=0

a= -4, -9

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