Mathematics High School

x = −3 y = 4 and z = −5

Work out the value of x + 2y − 3z

Answers

Answer 1

Answer:

20

Step-by-step explanation:

-3+ 2(4) - 3(-5)

= -3+ 8 + 15

=20

Related Questions

Please help me with my question the question is in the photo

Answers

Answer:

6 intersections

Step-by-step explanation:

At what point do the lines y = x - 8 and y y = - 3x + 16 (4, - 4) (3 ) (0, 16) (2) (11, 3) ( ) (6, - 2)

Answers

Answer:

(6, -2)

Step-by-step explanation:

Correct question

At what point do the lines y = x - 8 and y = - 3x + 16 intersects?

Equating both expressions;

x - 8 = -3x+16

Collect like terms

x+3x = 16+8

4x = 24

x = 24/4

x = 6

Substitute x = 6 into any of the equation

Recall that y = x - 8

y = 6 - 8

y = -2

Hence the point (x, y) where they intersects is at (6, -2)

Mike is saving money for a new bike that costs $180.00.

​​If m represents the amount of money he has saved ​so far, which expression represents the amount of money,​in dollars, he still needs to save?

A. 180 + m

B. 180 - m

C. 180 x m

D. 180 ÷ m

Answers

Answer:

180-m

Step-by-step explanation:

Answer:

The answer is B. 180-m....

Write this equation in slope and intercept form. 2x+3y=0

Answers

Correct answer is y = mx + b, where m is the slope and b is the y-intercept

What is the value of x
53
180
60
90

Answers

Answer:

I got ans 28 but not there in options I am sorry

Answer:

53

Step-by-step explanation:

x+x+2+72=180

2x=180-74

2x=106....divide both by 2

x=53

james and elaine share a box of sweet in the ratio2:3 what fraction of sweets does a) james receive b) elaine receive​

Answers

Answer:

SEE BELOW FOR ANSWER

Step-by-step explanation:

THE PROBLEM TELLS US JAMES AND THEN ELAINE

SO THE RATIO IS JAMES 2 AND ELAINE 3


A pair of pants that cost $75 is on sale for 20% off. What's the new price?

Answers

Answer:

60 dollars

Step-by-step explanation:

Answer:

$60

Step-by-step explanation:

Percentages are out of 100. Move the percentage sign twice in 20% to get 0.20.

Then, multiply 0.20 by 75. This gives you 15.

Lastly, subtract 15 from 75 (75-15), giving you $60 as your new price.

Solve the system of equations.
- 5x + 2y = 9
y = 72

Answers

Answer:

welcome to brainly

Step-by-step explanation:

Danika picked no more than 40 apples for baking pies. Her recipe for 8 apples to make 1 pie. If p is the number of pies Danika will make, which inequality describes the value of p?

Answers

Answer:

Step-by-step explanation:

C

Answer:

c

Step-by-step explanation:

c

What is the change in temperature from 15°F to -8°F?
7°F
23°F
-23°F
-7°F

Answers

The answer would be -23F because if we add -23 to 15 it would be -8

Please help!! Giving brainliest and extra points!! (Click on the photo)

Answers

Answer:

156cm squared. It is the only reasonable one

Step-by-step explanation:

Find the circumference of the circle.
Use = 3.14
12 cm
A 18.84 cm
B 37.68 cm
C 34 cm
D 113.04 cm

Answers

I think it’s B because 3.14 times 12 is 37.68.

Tyler buys 3 1/2 pounds of fresh beans. The beans are on sale for $0.98 per pound. Which expressions can Tyler use to calculate the amount of money that he will need to buy the beans? Check all that apply. 3 × 0.5 3.5 × 0.98 7/2 × 98/100 6 × 0.98 O 7 × 49/50​

Answers

Answer:

B and C or in other words 3.5 x 0.98 and 7/2x98/100

Step-by-step explanation:

1
To make 8 cups of tomato soup you need 2 pounds of tomatoes. How many pounds of tomatoes do you need to make 32 cups of soup?

Answers

Answer:

72

Step-by-step explanation:

4) Share 40 buttons between Freya and Sophie in the ratio 6:2

Answers

the ratio is chocky stick

Answer:

Freya's share = 6×5=30

Sophie's share = 2×5=10

Step-by-step explanation:

6x+2x= 40

8x= 40

x= 5

Freya's share = 6×5=30

Sophie's share = 2×5=10

Hope this helps you.


Line q passes through the points (4, 6) and (0,6). What is the equation for the line which is perpendicular to q and passes through the point (-2,3)?

Answers

9514 1404 393

Answer:

  x = -2

Step-by-step explanation:

Line q is the horizontal line y = 6, so the perpendicular line will be vertical. In order for it to go through the point (-2, 3), the equation must be ...

  x = -2

Help me the picture is above.

Answers

Answer:

10 because I am a bdgjndbk

3x + 25 = 2(4x – 10) solve step by step

Answers

Answer:

x=9

Step-by-step explanation:

3x + 25 = 2(4x – 10)

3x + 25 = 8x-20

3x-8x=-20-25

-5x=-45

5x=45

x=9

The answer is: X=9 first step is to distribute 2 into 4x and -10 then move the 8x over behind the 3x, then combine 8x and 3x together to get -5x=-20-25 combine -20 and -25 to get -45 then divide -45 by -5 to get x=9

HALP!!! DON'T MIND MY TABS BTW!! JUST NEED HELP!!! SUPER eAsY!!

Answers

Answer: cv

Step-by-step explanation:

sorry for blur but please help

Answers

Answer:

0 => -5

1 => -3

2 => 3

3 => 13

Step-by-step explanation:

No worries! To fill the table, we need to take the x values and insert them for the f(x) value.

The equation we're given is

f(x)=2x²-5

Starting with 0, we have

2(0)²-5

0²-5

0-5

-5

If we repeat for the rest of the values, we get the f(x) values listed above.

Answer: 0= -5 1=-3 2=3 3= 13

To answer this for every Number there is for x you have to plug it in

2(0)^2 -5
2(0)-5
0-5
=-5


2(1)^1-5
2(1x1)-5
2-5
=-3

Hope this helped!!

I will give brainliest to whoever answers this correctly

Answers

Answer:

A. x=5

B. y=8

C. 16.4

D. w=5

Step-by-step explanation:

I hope this helps

Answer:

A= 150 cm

B= 4 cm

Sorry if its wrong

BRAINLIEST FOR THE CORRECT AWNSER!! This graph shows the solution to which inequality?

Answers

your answer is d) y>4/3x-2

Answer:

d

Step-by-step explanation:

so first off because it is a dotted line then it can only either be < or >.

If the shaded region is about the line than y is greater than but if its below the line then y is less the and because its above then y is greater than.

The length of a piece of ribbon is 1 1/2yards. How long is the ribbon in inches?

(1 yard = 36 inches)

(lol I need help on this)

Answers

The length of the piece of rubin on is 54 inches

Will spent $3.75 for 3 pounds of granola. What is his unit rate in dollars per pound?
$3 per pound
$1.25 per pound
o per pound
$2.50 per pound

Answers

the unit rate is $1.25 per pound

4 is the radius
Find the area of the semicircle.

Answers

Answer:

25.12sq.cm

Step-by-step explanation:

Answer:

6.28

Step-by-step explanation:

Because a=pi times the radius squared divided by 2

a= 3.14 times 2 squared

(GIVING BRAINLIEST!!)

The library is 5 miles from the post office. How many yards is the library from the post office?

A) 5 yards
B) 352 yards
C) 8,800 yards
D) 17,600 yards

Answers

Answer: C) 8,800 yards

Hope this helps (:

Which of these systems of equations have no solution? Choose one.

Answers

Answer:

The second one

Step-by-step explanation:

The two lines never intersect.

the sum of two numbers is 10. Their product is 1 less than 5^2

Answers

Answer:

4 and 6

Step-by-step explanation:

trust me

Answer:

4 and 6

Step-by-step explanation:

6 + 4 = 10

6 x 4 = 24 which is one less than 5 x 5 which is 25

Convert the following equation into slope- intercept form.
-10x+5y=20

Answers

Answer:y=2x+4

explanation:

−10x+5y=20

Step 1: Add 10x to both sides.

−10x+5y+10x=20+10x

5y=10x+20

Step 2: Divide both sides by 5.

5y=10x+20

5. 5

Y=2x+4

-4x + 64 < 242 + 3x
Giving extra points

Answers

Answer:

x>−178/7

Step-by-step explanation:

I'm assuming you wanted to solve for the inequality of x, if so this is the answer.

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