Given the system of equation 7x-3y = 48 .......Eq 1 2x+ y = 35 ........Eq 2 __________ To solve this system by elimination and multiplication , i can ...............................

Answers

Answer 1

Answer:

x = 11.75

y = 11.5

Step-by-step explanation:

By Elimination Method:

   7x - 3y = 48    ---- (1)

-

   2x + y = 35   -----   (2)

Multiply equation (1) by 2 and equation (2) by 7

   14x - 6y = 96

-

   14x + 7y = 245      

     0   -13y = -149

-13y = -149

y = -149/-13

y = 11.5

From equation (2); replace y with 12

2x + y = 35

2x + 11.5 = 35

2x = 35 - 11.5

2x = 23.5

x = 11.75


Related Questions

Slope intercept form of (2,4) slope is 2

Answers

To write slope intercept form from a point, you take the 2 and covert it to 2/1, or rise/run form. Then you find the y-intercept. Now listen, this is very complicated. Ready? It's the y-coordinate. 4. Veery complicated.

So y=2/1+4

---

hope it helps

WILL MRAK BRAINLIESTTTT IF GOTTEN RIGHT DONT ANSWER IF U DONT KNOW!

Answers

Answer:

BC=4

Step-by-step explanation:

didn't i do this already lol

Please help! I don't know this question.

Answers

Answer:

B. 14/15

Step-by-step explanation:

I hope this helps.

Answer:

B: 14/15

Step-by-step explanation:

Here's why I say this:

The total is 120. 8 have a box meaning 112 do not have a box. The question is asking about those without a box, so 112 will be used. 112/120. Simply by dividing each the numerator and denominator, in this case by 8. The fraction left is 14/15

Jake is making cookies. To make 30 cookies, his recipe requires 4 eggs. Using this recipe, what is the total number of eggs he will need to make 120 cookies?

Answers

Answer:

16 eggs

Step-by-step explanation:

Steps to answering this question

determine how many eggs would be required to make one cookiesMultiply the answer gotten above by the number of cookies

Number of eggs needed for one cookie = 4/30 = 0.1333

Number of eggs needed for 120 cookies = 0.1333 x 120 = 16 eggs

Given the function y=-\frac{3\sqrt{x^5}}{4},y=− 4 3 x 5 ​ ​ , find \frac{dy}{dx}. dx dy ​ . Express your answer in radical form without using negative exponents, simplifying all fractions.

Answers

Given:

The function is:

[tex]y=-\dfrac{3\sqrt{x^5}}{4}[/tex]

To find:

The value of [tex]\dfrac{dy}{dx}[/tex].

Solution:

We have,

[tex]y=-\dfrac{3\sqrt{x^5}}{4}[/tex]

It can be written as

[tex]y=-\dfrac{3}{4}x^{\frac{5}{2}}[/tex]        [tex][\because \sqrt[n]x=x^\frac{1}{n}][/tex]

Differentiate with respect to x.

[tex]\dfrac{dy}{dx}=-\dfrac{3}{4}\times \dfrac{5}{2}x^{\frac{5}{2}-1}[/tex]       [tex][\because \dfrac{d}{dx}x^n=nx^{n-1}][/tex]

[tex]\dfrac{dy}{dx}=-\dfrac{15}{8}x^{\frac{5-2}{2}}[/tex]

[tex]\dfrac{dy}{dx}=-\dfrac{15}{8}x^{\frac{3}{2}}[/tex]

[tex]\dfrac{dy}{dx}=-\dfrac{15}{8}\sqrt{x^3}[/tex]

Therefore, the value of [tex]\dfrac{dy}{dx}[/tex] is [tex]-\dfrac{15}{8}\sqrt{x^3}[/tex].

calculate
4x^2+6x-9 if x=3
3y+7(2y-5) if y=4

Answers

Answer:

1. 45

2. 33

Explanation:

1. 4x² + 6x - 9

= 4(9) + 18 - 9

= 36 + 18 - 9

= 45

2. 3y + 7(2y - 5)

= 12 + 7(8 - 5)

= 12 + 56 - 35

= 33

i hope this helps! :D

Answer:

45

33

Step-by-step explanation:

4(3)^2+6(3)-9= 36+18-9= 45

3(4)+7(2*4-5)= 12+7(8-5)= 12+7(3)= 33

A boy scored 48 marks on test. This was 60% of the marks on the test. What was the total the test was marked out of

Answers

Answer:

80 marks

Step-by-step explanation:

I WILL MARK AS BRAINLIST IF U GET IT RIGHT....... How many proportional relationships are shown in the coordinate plane below?

A. 0
B. 1
C. 2
D. 3

Answers

Answer:

c. 2

Step-by-step explanation:

c

Answer:

The answer is D) There are three proportional relationships

Step-by-step explanation:

The green line (the one in the middle) is a straight line through the origin. This is a proportional relationship.

Reason: It goes through 0,0

----------------------------------------------------------------------------------------------------------------

The blue line (the one at the top) is a straight line through the origin. This is a proportional relationship.

Reason: It goes through 0,0

----------------------------------------------------------------------------------------------------------------

The purple line (the one at the bottom) is a straight line through the origin. This is a proportional relationship.

Reason: It goes through 0,0

----------------------------------------------------------------------------------------------------------------

Conclusion: Since the blue, green, and purple lines are proportional, this means all 3 lines are proportional.

Note:

I know my answer is very late but I wanted to help anyone who needs it for future reference.

Part A: Xavier needs to collect at least 120 cans for a food drive to earn community service credit. He has already collected 64 items. Choose the correctly written inequality to represent the number of cans, c, that Xavier must still collect (before solving)
A 64 + c ≥ 120
B 64 + c < 120
C c - 120 ≤ 64

Answers

Answer:

A

Step-by-step explanation:

He needs to collect at least 120 so if c is what he must still collect

64 +c must be greater than or equal to 120

Michelle delivers books to school libraries. her truck has a slide out ramp for unloading the books. the top of the ramp is 3 ft above the ground. the ramp itself is 5.2 ft long. what is the horizontal distance the ramp reaches

Answers

Answer:

4.2 ft

Step-by-step explanation:

We can assume that the truck is vertically straight, so this will make up the vertical side of the triangle.

This means that the triangle is a right triangle since a right angle will be formed with the ground and the 3 ft side.

Next, we have the ramp length which is 5.2 ft long. This will be the hypotenuse of the right triangle since the ramp is slanted.

We want to find the length of the horizontal leg of the right triangle, which will give us the horizontal distance the ramp reaches.

We can use the Pythagorean Theorem since this is a right triangle:

a² + b² = c² a and b are the legs, c is the hypotenuse

Substitute these values into the equation and solve for b.

(3)² + b² = (5.2)² 9 + b² = 27.04 b² = 18.04 b = 4.24735211632

The horizontal distance the ramp reaches is 4.2 ft, parallel to the ground.

For an assignment, Jorge needs to translate a figure on a coordinate plane. A vertex of the figure is at (-2,5). After translation, that vertex is at (4,-2), as shown in the diagram
below.

Which steps did Jorge use for the translation?

Answers

Answer: Im so sorry but I have not done this in such a long time

Step-by-step explanation: Have a good day

A cylinder has a radius of 10 yards. Its volume is 3,454 cubic yards. What is the height of the cylinder?

Use ​ ≈ 3.14 and round your answer to the nearest hundredth.

Answers

Answer:

11 yard

Step-by-step explanation:

volume of a cylinder=πr²h ⇒ 3454=3.14×10²×h

⇒ h=3454/314=11 yard

Answer:

6,769.84 yards

Step-by-step explanation:

Find m
A.45
B.135
C.145
D.180



Please help now please!!!!!!

Answers

I think the answer is c

pls, help me pls pls pls

Answers

Answer:

14.4

Step-by-step explanation:

you can do 12*1.2= 14.4

becuase they didnt say equal to or less than 24 and they also didnt say equal to or  greater than 12 hope this helps

find the product of (3x+8)^2

Answers

Answer:

The product is 9x^2+48x+64

Step-by-step explanation:

Jane used a calculator to find 45% of 60. What number did Jane get?

Answers

Answer:

27 is the answer.

Step-by-step explanation:

(45/100)*60

=27

HEJEKEKFLSKSLCBDMLDgbnnbvgfknfnfkskskfjgjdkwkdjdkdkdkdjdks

Answers

Answer:

um.... 17??????????????????

Answer:

HDHEHFGEWGDYDGYDHWQFSWDWSQWYUWEHWW8WDWD

Step-by-step explanation:BHDHEJKNHRGHRFYRHDHNHNEBFDYHFBVUUUFHECHFHVYGDFRFHRHFFRUFYYRFFRYFYFYRFREYRYFGFWYBGT

Find the circumference of a 11cm radius circle using pi 3.14

Answers

Answer:

69.08 cm

Step-by-step explanation:

circumference= 2πr = 2 × 3.14 × 11 cm

Answer:

69.12 cm

Step-by-step explanation:

C = 2πr

C = 2(3.14)11

C = 6.28(11)

C = 69.12 cm

hii please help i’ll give brainliest!!

Answers

answer:


friction


lol you’re welcome

2x^2+6x+4

Show work please!!

Answers

Answer:

You don't have to do anything

Step-by-step explanation:

It's simplified already unless you want a graph.

I am agreeing with luffy

Sasha buys bagels for her garage sale customers she buys all the chocolate chip bagels and half of the plain bagels each bagel cost 2.50 how much does Sasha spend on bagels

Answers

The question is incomplete:

Sasha buys bagels for her garage sale customers she buys all the chocolate chip bagels and half of the plain bagels each bagel cost 2.50 how much does Sasha spend on bagels? The table that shows the types of bagels sold at the bagel shop on Friday is attached.

a. $70

b. $20

c. $90

d. $110

Answer:

c. $90

Step-by-step explanation:

First, you need to find the amount of bagels that Sasha purchased. The statement indicates that she buys all the chocolate chip bagels and the table shows that 28 chocolate chips bagels were sold, so that's the amount she purchased of this type of bagels. Also, the statement indicates that she buys half of the plain bagels and the table says that 16 plain bagels were sold, so you have to divide this amount by 2:

16/2=8

Then, you have to add the amount of chocolate chips bagels plus the amount of plain bagels that Sasha purchased:

28+8=36

Now that you know the amount of bagels that Sasha purchased, you have to multiply this for 2.50 that is the price per bagel:

36*2.50=90

According to this, the answer is that Sasha spends $90 on bagels.

Alma just received a 8% raise in salary. Before the raise, she was making $65,000 per year. How much more will Alma earn next year?

Answers

Answer:

70200

Step-by-step explanation:

8% of 65,000 is 5200

I added 65000 and 5200 and received.

Hopefully this is accurate/true. Not the best at finance.

I'm in trouble. Please solve this two questions!! ​

Answers

Answer:

.........................

Answer:

Step-by-step explanation:

let's figure out first the value of the angles from 0- 360 degrees

help? i wud rly appreciate it <3

Answers

Answer:

D

HOPE THIS HELPS

-Todo <3

Step-by-step explanation:

-3x+1<7

     -1  -1

-3x<6

/-3    /-3

x>-2(you divided by a negative so flip the sign, the sign also tells you which way the graph should be covering :D)

What is 16 – x at x = 5?

Answers

Answer:

11

Step-by-step explanation:

16-x

substitute with 5

16-5

11

The value is 11.

What is Subtraction?

Subtraction is the process of taking away a number from another. It is a primary arithmetic operation that is denoted by a subtraction symbol (-) and is the method of calculating the difference between two numbers.

Here, given that,

16-x

now, we have to ,

substitute with 5

=16-5

=11

Hence, The value is 11.

To learn more on subtraction click:

brainly.com/question/2346316

#SPJ2

Rewrite and simplify. 64-3/4

Answers

Answer:

63 1/4

Step-by-step explanation:

Can someone help me? Pls i will mark you brainliest

Answers

Answer: 1 B  2 A

Step-by-step explanation:

The cost of 40 litres of petrol is £42.40. Work out how much it would cost for 70 litres of petrol. Please help me I will give brainliest and 5 stars!!

Answers

Answer:£[tex]74.2[/tex]

Step-by-step explanation:

Given

Cost of [tex]40[/tex] liters of petrol is £[tex]42.40[/tex]

Using Unitary method

[tex]40[/tex] liters cost ↔£[tex]42.40[/tex]

[tex]1[/tex] liter cost ↔ [tex]\dfrac{42.40}{40}=1.06[/tex]

[tex]70\ \text{liters cost}\ \rightarrow1.06\times 70=[/tex]£[tex]74.2[/tex]

The product of two numbers is negative. What conclusion can you draw about the sign of the quotient of the same numbers? *​

Answers

According to the law of signs for division, the quotient of 2 numbers of different sign is negative

Answer:

The quotient is negative.

Step-by-step explanation:

The rules of signs for multiplication and division of two numbers are the same.

If you multiply or divide two numbers with the same sign (both positive or both negative), the answer is positive.

If you multiply or divide two numbers with different signs (one positive and one negative), then the answer is negative.

Since the product is negative, then the quotient is also negative.

Answer: The quotient is negative.

which one is correct?

Answers

Answer:

SSS or SAS

Step-by-step explanation:

Remark

Since the two diagonals bisect each other, you have created two sets of equal lines. If that is the case, then you could prove the equality of the triangles 2 different ways.

1) The angles at the center are vertically angles which makes them equal. Since they are equal, the triangles are congruent by SAS. Notice that the angle is between the 2 equal sides.

2) Since CD and AB are marked as being equal, the triangles are congurent by SSS.

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