Mathematics High School

can you tell me how to solve this problem using substitution step by step?

y = -2x - 9 and 6x - 5y = - 19

Answers

Answer 1

Answer:

x = -4

Step-by-step explanation:

The first equation tells us what y is equal to. We then substitute wherever there is a y with what y equals.

y = -2x - 9

6x - 5y = -19

6x - 5(-2x-9) = -19

6x + 10x + 45 = -19

16x + 45 = -19

16x = -64

x = -4

Related Questions

Write the equation of a line in point-slope form
that has a slope of -2 and passes through the point
(-5,9).
A. y - 9 = -2(x + 5)
B. y - 9 = -2(x – 5)
C. y - 5 = -2(x – 9)
D. y -5 -2(x + 9)

Answers

Format: y-y1 = m(x-x1)
y1 = 9, x1 = -5, m = -2
Solution: A. y-9 = -2(x+5)

Samantha is on the basketball team. At her game, she scored 19 out of 25 baskets. What percentage of shots did Samantha make?

Answers

Answer:

SAMANTHA IS ON A BASKETbALL TEAM I  NEVER KNEw

Step-by-step explanation:

She made 76% of the shots she took

Which equation is an increasing linear relationship?
y=-100x+150
y=100x-150
y= -10x

Answers

The answer is 5x because it’s added

3/4 x 5/6 plssssssssssss help

Answers

the answer is 5/8 :)

3/4*5/6

cross out 3 and 6 and divide by 3

3/3=1

6/3=2

1/4*5/2

multiply the numerator together

1*5=5

multiply the denominator together

4*2=8

1/4*5/2=5/8

answer:

5/8

Which Angles are Congruent?

Angle A and Angle B


Angle C and Angle B


Angle A and Angle C

Answers

Answer:

Angle b

Step-by-step explanation:

Angles A and B.  

Explanation: x and 9 are congruent because of isosceles triangle

Help plsss and Idk if you can see the questions or not but if u can't lmk

Answers

A:

y=(oranges, x, for example)/4

B:

1: 1.25

2: 24

2x + 3y = -10
5y = 4x - 2

Answers

Answer:

(-2, -2)

Step-by-step explanation:

Answer:

(-2,-2)

Step-by-step explanation:

M a t h w a y

Urgent!!!!

If you were 6' 6 1/2" tall, about how many meters tall would you be? Hint: "There are 3.28 feet in a meter."

6.4 meters
2 meters
1.8 meters
7 meters
3.5 meters

Answers

Step-by-step explanation:

2 meters is the answer

please give me brainliest

Someone please help me!!

Answers

Sorry the question isn’t loading on my screen

Mai is flying a plane at an altitude of 1600 ft. She sights a stadium at an angle of
depression of 35°. What is mai’s approximate direct distance to the stadium?

Answers

Answer:

2,789ft

Step-by-step explanation:

The set up will give a right angled triangle.

The altitude will be the opposite side = 1600 ft

The angle of depression = 35°

approximate direct distance to the stadium is the hypotenuse of the trisngle= x

Using the SOH trig identity to get the distance

sin 35 = opp/hyp

sin 35 = 1600/x

x = 1600/sin35

x = 1600/0.5736

x = 2,789.4ft

Hence mai’s approximate direct distance to the stadium is 2,789ft

Plsss help I’ll give u brainlest and 10 points

Answers

The answer would be B I hope this helps.

Find the rule, and type the missing number in the sequence. 920, 855, 790, ____

Answers

It’s “725”, just subtract it by 65..
It’s 725,just by subtracting it by 65...

i really need help asap

Answers

answer is d (-3,1) hope i helped:)

Answer:

D (-3, 1)

Step-by-step explanation:

Use the table to find the ratio. Enter the ratio as a fraction in simplest form.


Color of socks
Numberof socks


white
black
blue
brown
3
8
6
3

The ratio of white socks to brown socks is

Answers

The answer is 1/1 or 1

please help me out ​

Answers

Answer:

C

Step-by-step explanation:

BRAINLIEST PLEASE

Answer: A

Step-by-step explanation:

12 and 16

A group of friends went fishing. They each caught 20 fish but not all of them were keepers. Which person was able to keep 3/5 of the fish that he or she caught?

Answers

Answer:

Those who were able to keep 12 fishes

Step-by-step explanation:

Given

Total = 20 (each)

Required

Which was able to keep 3/5

First, we need to calculate 3/5 of the total number of fishes

Fish = 3/5 * 20

Fish = (3 * 20)/5

Fish = 60/5

Fish = 12

From the calculation above, only those who keep 12 of the 20 fishes were able to keep 3/5 of their fishes

12. What is the length of the radius of a circle whose area is 100x?
A. 5
B. 10
C. 20
D. 25

Answers

Answer:

A.5

Step-by-step explanation:

d=2 sqare root Area÷pi

d=11.2 ÷2

radius = 5

The graph shows the number of items sold by category at a yard sale.
Items Sold
28
24
Frequency
20-
16
12
8
4
0
Toys
Books
Décor
Clothing Electronics
Categories
What was the total number of items sold at the yard sale?
A. 60
B. 62
O c. 64
D. 66​

Answers

Answer: 62

Step-by-step explanation: items sold is 28 and 24 so add them which is 72subtact 20

I might be wrong sorry

Which expression is equivalent to (3a + 7) (2a - 5)?
OA. 5a2 - a - 35
B. 5a2 - 29a - 35
O
OC. 6a2 - a - 35
O D. 6a2 - 29a - 35

Answers

Cross multiply
(3a+7)(2a-5)
5a2-15a+14a-35
5a2-a-35
ANSWER:A

2 2/3 divided by 1 1/6

Answers

Answer:

2.28

Step-by-step explanation:

Answer:

2/9

Step-by-step explanation:

calculated

Somebody can help me with this ,, I’m going to really appreciate Is function,,, Algebra

Answers

Answer: b

Step-by-step explanation:

itssssssss b :)))))))))(

PLEASE HELPPP!!!!
what value(s) of x will make x^2 = 100 true?

A. 50 and -50

B. 10 and -10

C. 10

D. )10

Answers

Answer:

C

Step-by-step explanation:

I choose C because when you have an exponent whatever number u have over the c you multiply whatever number is chosen and when divide 100 by 10 you get 10. Hope I helped❤✌

Answer: 10

Step-by-step explanation:

10 x 10 = 100

50 x 50 = 2,500 which is wrong

-10 x 10 = -100 false

4 + 3x = 3х + 5
4 = 5

Answers

Answer:

4≠5

There is no solution

Step-by-step explanation:

Help !!! I need help With this question!

Answers

Answer:

135°

Step-by-step explanation:

I don't know exactly but iv done the math and I think it's C 135°

A circle is graphed on a coordinate grid. It’s center is at (3,4), and the circle passes through point (3,1). What is the approximate area, in square units, of the circle?

Answers

Answer:

254.3 sq.units

Step-by-step explanation:

radius of circle

(3,1)-(3,4)= (0,-3)

r= 9 units

Area= πr^2

Area= 254.3 square units

Brainliest if correct please help

Answers

Answer:

3/10

Step-by-step explanation:

so 1/5 probability

3 is the frequency so

10 times spun

3/10 is the answer

Find the smallest possible integer value of k for which 264k is a perfect square.

Answers

Step-by-step explanation:

264k

= 2³ * 3 * 11 * k

Hence, k = 2 * 3 * 11 = 66.

Answer:

k = 66.

Step-by-step explanation:

Find the prime factors of 264

264  =  2 * 2 * 2 * 3 * 11

The nearest perfect square will contain  one more 2, one more 3 and one more 11

=  264 * 2 * 3 * 11

= 17424.

Solve for X:
WILL GIVE BRAINLIEST!

Answers

The whole thing all together is 120 and the total woulde be 190 for that shape so your answet is 70 :D

Please hurry!! Steven and Dan like to play a lot of video games. On Sunday, Dan played 4 fewer than twice the number of hours that Steven played. They played a total of 17 hours on Sunday. Which system of equations models this situation if Steven played s hours and Dan played d hours?

A) d=4-2s s+d=17

B) s=2d-4 s=17-d

C)d=2s-4 s+d=17

D)s=4-2d d=17-s

Answers

Answer

Step-by-step explanation:

Answer:i think A or C

Step-by-step explanation:

i'm not sure about my answer but i chose C and i don't know if i got it wrong or right but its either both of them i hope this helps.

which list shows the area ordered from greatest to least​

Answers

Answer:

C

Step-by-step explanation:

i think

The correct answer is C
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