Mathematics High School

Hi, I dont understand this. can anyone explain how to solve it ASAP?

What is the x-value of the solution to the system of equations?
5x + 4y = 8
2x − 3y = 17

a. −3
b. −2
c. 4
d. 5

Answers

Answer 1

Answer:

x=4, y=-3. (4, -3).

Step-by-step explanation:

5x+4y=8

2x-3y=17

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

2(5x+4y)=2(8)

-5(2x-3y)=-5(17)

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

10x+8y=16

-10x+15y=-85

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

23y=-69

y=-69/23

y=-3

5x+4(-3)=8

5x-12=8

5x=8+12

5x=20

x=20/5

x=4

Related Questions

Calcule (1/2)-² POR FAVOR RESPONDEM​

Answers

Answer:

I think it's 1/4 or .25

What is the measure of angle 3?

Answers

the measure of angle 3 is 90

When solving (5/3)^-2 What do you do first?

Answers

Answer:

steps:

(5/3)^-21 / (5/3)² (first turn the negative exponent to positive)1 × 3²/5²  (division by a fraction turned to multiplication by the multiplicative inverse of (5/3)²)3²/5²9/25

The following dot plot shows the mass of each rock in Nija's rock collection. Each dot represents a different rock.

Answers

Answer:

To find the total mass you will add the following masses together:

1/4 + 1/4 + 2/4 + 2/4 + 2/4 + 3/4 + 3/4

For every X you list the number that many times.

The sum is 14/4 or 3 2/4 or

3 1/2.

The answer is choice D.

Read more on Brainly.com - https://brainly.com/question/9499907#readmore

Step-by-step explanation:

Answer:

40.5

Step-by-step explanation:

35 + 39 + 39 + 43 + 43 + 44 = 243g

I know I may not be an expert, and my level is only ambitious, but I had to add this answer because recently, I've seen a lot of, "Ace's" or, "Genius's" getting answers wrong.

Josie makes fruit punch by mixing fruit juice and lemonade in the ratio 3:2
She needs to make 35 litres of punch for a party.
How much of each ingredient does she need?
Fruit juice =
Lemonade =​

Answers

Answer:

fruit-21

lemonade -14

Step-by-step explanation:

to find out how many parts you have you add 3 and 2 together, this gives you 5, 36÷5=7 so for every 1 of each you have 7, 3×7=21, 2×7=14

Answer:

Step-by-step explanation:

F/L=3/2

F=3L/2

F+L=35, using F found above makes this become

3L/2+L=35

3L+2L=70

5L=70

L=14, since F=3L/2

F=3(14)/2

F=21

So she needs

Fruit juice=21 liters

Lemonade=14 liters

75% of b is 12. what is b?

Answers

Answer:

16

Step-by-step explanation:

same explanation as last time accept its 3/4 into 4/3

Answer: b = 16

Steps:
75% of b is 12
75% * b = 12
0.75 * b = 12
b = 12/0.75
b = 16

Check:
0.75 * 16 = 12
12 = 12 ✅

If this was correct and helpful I would appreciate the brainliest! :)

Erika decided to compare her observations to the average annual trend, which shows the water rising 1.8 mm/year. Remember, she used 6.2 years as her time period. Explain how she would calculate the difference between how much the water level fell in the part of the river she observed.

Answers

Answer:

Change in water level over thr period Given is 11.16 mm

Step-by-step explanation:

The change in water level. In the part of the river observed will be ;

Water level. = The rate of change in water level per year * period

Rate of change in water level = 1.8mm /year

Number of years = 6.2

The change in water level is thus :

1.8 mm / year * 6.2 years

= (1.8 mm / year * 6.2

= 11.16 mm

Fill in the blank



10:18=________:9

Answers

Answer:

the answer to the blank is 5

(just in case you're confused) the answer is 5:9

Step-by-step explanation:

PLEASE HELP ME I AM SO LOST
2+2=?
please i am desperate this is due today

Answers

Answer:

I think 4?????

Step-by-step explanation:

I don't know

Answer:

...

2 + 2 = 4

hope that helps...

PLEASE ANSWER ASAP. I'LL GIVE BRAINLIEST
Prove: If two chords of a circle have a common endpoint and form congruent angles with the radius drawn to that endpoint, then the chords are congruent.

Answers

Answer:

.

See the diagram attached below.

Let the chords be AB and AC with common point A.

AD is the diameter. Join B with D and C with D to form two triangles.

We need to prove that AB=AC.

\begin{gathered}In\ \triangle ABD\ and \triangle ACD;\\Given\ that\ \angle BAD=\angle CAD----(condition\ 1)\\since\ AD\ is\ diameter, \angle ABD=\angle ACD = 90^0\\So\ \angle ADB=\angle ADC--------(condition\ 2)\\AD=AD\ (common\ side)-----(condition\ 3)\\ \\So\ the\ triangles\ are\ congruent\ by\ ASA\ rule.\\Hence\ AB=AC.\end{gathered}

In △ABD and△ACD;

Given that ∠BAD=∠CAD−−−−(condition 1)

since AD is diameter,∠ABD=∠ACD=90

0

So ∠ADB=∠ADC−−−−−−−−(condition 2)

AD=AD (common side)−−−−−(condition 3)

So the triangles are congruent by ASA rule.

Hence AB=AC.

What is the volume of the prism below?

Answers

Answer:

64 feet cubed

Step-by-step explanation:

4x4x4=64

Answer:

V=Volume

V = 64 ft³

4 x 4 x 4 = 64 or 64 ft³

9. If ground beef costs $4.98 for 3 pounds, then what is the unit rate (cost per
pound)?
(a) What is the unit rate (cost per pound)? Don't forget units!
(b) Explain how you found the unit rate.
Explanation:

Answers

Answer:

1.66 pounds

Step-by-step explanation:

4.98 dollars divided by 3 pounds

3 m * 0 * 5 m = 0 what kind of property is this. PLS HURRY!

Answers

Answer: This kind of property is the multiplicative property of 0.

Answer:

The answer should be muiltpication Property

Step-by-step explanation:

Since its dealing with multipication of the number 0 then its multipication property if not then it might be associative property. Let me know if this helps

factor the expression using the GCF 24-18

Answers

So you start by dividing 6 out of the expression and you get 6(4-3)

Answer:

6

Step-by-step explanation:

6 is the answer my guy

Any idea. I have no clue. Thanks

Answers

Answer:

your answer should be B :)

for every 3 boys there are 5 girls if there are 30 girls how many boys will be there

Answers

Answer:

18 boys

Step-by-step explanation:

Answer:

18 boys

Step-by-step explanation:

There is a 3:5 ratio of boys to girls

The ratio we need to find is ?:30

5 times 6 is 30, which means we have to multiply 3 by 6 to find the number of boys

3 times 6 is 18

Mary bought 4 small cookies for 40 cents each and 2 large cookies for 90 cents each how much did she spend all together

Answers

Answer:

$3.40

Step-by-step explanation:

4x.40 is 1.60

2x.90 is 1.80

Then you take 1.80+1.60 to get $3.40 Hope this helps!

Pythagorean therom HELPPPO

Answers

Answer:

6

Step-by-step explanation:

change up the formula so:

sqrt (10^2-8^2)= 6

Hey lol can someone help with this question?

Answers

6.0 would be the answer

The table of values below represents an inverse variation relationship. what is the value of x when y= "3.25"?
X l Y
2 l 13
4 l 6.5

A. X=84.5
B. X=8
C. X=5.3
D. X=21.1

Answers

Using the constant of proportionality, the value of  when y is 3.25 is 0.5 from the inverse variation.

What is inverse variation relationship?

An rise in one variable causes a decrease in the other and vice versa in a mathematical relationship between two variables known as inverse variation, also known as inverse proportionality or inverse relationship. The following equation represents inverse variation:

y = k/x

In this equation, "y" and "x" stand in for the two variables, and "k" is the variational constant. Throughout the connection, the constant of variation has a set value that never changes.

Using the data given;

y = kx

Let's find the value of k;

k = constant of proportionality

13 = k(2)

k = 13/2

k = 6.5

Using the value of k;

3.25 = 6.5x

x = 3.25 / 6.5

x = 0.5

NB: The options given are incorrect and if you will follow through the steps, you will understand the options are incorrect.

Learn more on inverse variations here;

https://brainly.com/question/31987518

#SPJ1

help please????????????​

Answers

Answer:

1st one is correct ....................

Answer:

x = 8, y = 12

Step-by-step explanation:

Since the triangles are congruent, we know that the parallel sides are equal to each other.

So,

4x - 7 = 3x + 1

4x - 3x = 1 + 7

x = 8

x + y = 20

8 + y =20

y = 20 - 8

y = 12

I need help to know the volume

Answers

Answer:

167.55 ur welcom

draw a number line and make ticks that are 1cm apart from-6 to7​

Answers

from left side of the line to the right, with even spaces in between: -6, -5, -4, -3, -2, -1, 0, 1, 2, 3, 4, 5, 6, 7

2555!!!!!!! Pointss!!!!!!

Answers

Answer:

17

Step-by-step explanation:

The range of the data is the range between the highest and lowest data point so in this case its 132 - 115

Answer:

17

Step-by-step explanation:

5) A cross-section of the cube is outlined in the diagram. Which two terms BEST describes the shape of the cross-section? A) square B) rectangle C) acute angles D) right triangle E) equilateral triangle

pleaseeeeee help

Answers

Answer:

It's C and E i just took the test trust me

Answer:

the person above me has the same name as my sister

Step-by-step explanation:

Calculate the following using long division show all working 896 divided by 7

Answers

Answer:

128

Step-by-step explanation:

896

7 goes into 8 once

Subtract 7 from 8 and bring the one down.

8 goes into 19 twice

Subtract 14 from 19 and bring the five down.

7 goes into 56 eight times.

So your answer is 128.

Hope this helps

convert 27ft in to inches

Answers

Answer:

324 inches

Step-by-step explanation:

There are 12 inches in a feet

12 * 27 = 324

Answer:

324 inches

Step-by-step explanation:

One feet is 12 inches so you have to multiply 27 by 12 and get 324

PLZ HELP ILL MARK U BRAINLIEST!!!!

Answers

Answer:

x=12

Step-by-step explanation:

58° = (5x-2)

add 2 to both sides

60 = 5x

divide by 5 on both sides x = 12

HELPPPPPPPPPPPPPPPPP

Answers

I think the answer is z=100

Answer:

I assume you are finding for z so

z=

Step-by-step explanation:

34+66 = -32+z+32

100 = -32+z+32

132 = z+32

100 = z

z = 100

An airplane leaves Edmonton International Airport and Flies south to Phoenix Arizona. The flight is 6h in duration and distance is 2800Km

A.) Write an equation that represents this flight.


PLEASE HELP FAST 20 POINTS!

Answers

2800/6=A hope it helps
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