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2 years ago

What is 9-4x=-23 what's the answer

Mathematics

1 answer:

svetlana [45]2 years ago

6 0

Download Math-way it gives answer for those Type of questions hope this helps

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PLS HELP WITH BOTH ASAP WILL GIVE BRAINLIEST

weeeeeb [17]

Answer:

13) 25 and 17

14) cupcakes = $5

brownies = $3

Step-by-step explanation:

13) you can set this up as equations

so x + y = 42

x-y = 8

solve simultaneously by subtracting from each other

2y = 34

y= 17

if y = 17

42 - 17 = 25 = x

14) set up as equations again

Ben 7c + 10b = 65

franklin 7c +7b = 56

subtract from eachother

3b = 9

b = $3

7c + 10(3) = 65

7c = 35

c = $5

5 0

2 years ago

Read 2 more answers

I need help with this problem

vitfil [10]

Answer:

all of the triangles are right triangles

6 0

2 years ago

Tyra is laying down square carpet pieces in her photography studio. Each square carpet piece is 1 yard by 1 yard. If Tyra's phot

irakobra [83]

Studio = 7 yards by 4 yards

Area = 7*4 = 28 square yards.

Area of square carpet = 1 yard * 1 yard = 1 square yard

Number needed = Area of studio / Area of square carpet = 28 / 1 = 28

Number needed = 28

3 0

2 years ago

Which is an equation of a line perpendicular to the line with the equation 5x-4y=8

Andrej [43]

Answer:

In exercises 3 and 4,write an equation of the line that passes through the given point and is parallel to the given line. 3. (1,3); y=2x-5 4. (-2,1); y= -4x+3 *In exercises 5 and 6, determine which of the lines,if any, are parallel or perpendicular. Explain! 5. line a passes through (-2,3) and (1,-1). Line b passes through (-3,1) and (1,4). Line c passes through (0,2) and (3,-2). 6. Line a: y= -4x +7 Line b: x= 4y+2 Line c: -4y+x=3 *In exercises 7 and 8, write an equation of the line that passes through the given point and is perpendicular to the given line. 7. (2,-3); y= 1/3x -5 8.(6,1); y= -3/5x-5 * In exercises 11-13, determine whether the statement is sometimes,always, or never true. Explain your reasoning! 11. A line with a positive slope and a line with a negative slope are parallel. 12. A vertical line is perpendicular to the x-axis. 13. two lines with the same x-intercept are perpendicular.

Step-by-step explanation:

4 0

2 years ago

Read 2 more answers

A scuba diver dove from the surface of the ocean to an elevation of -79 9/10 feet at a rate of -21.3 per minute. After spending

saw5 [17]

Answer:

The rate of change of the divers elevation is approximately 24.71 feet/minute

Step-by-step explanation:

The given information are;

The depth to which the scuba diver dove = $-79\frac{9}{10} \ feet$

The rate at which he dove = -21.3 feet/minute

The time which he spent at that elevation = 10.5 minutes

The elevation the diver then ascended to = $-8\frac{9}{10} \ feet$

The total time for the dive = $17\frac{1}{8} \ minutes$

Therefore, the time, $t_d$ , with which the scuba diver descended to $-79\frac{9}{10} \ feet$ is given as follows;

$t_d = \dfrac{Distance}{Speed} = \dfrac{-79\frac{9}{10} }{-21.3} \approx 3.75 \ minutes$

The time, $t_e$ , it took the scuba diver to elevate to $-8\frac{9}{10} \ feet$ is given as follows;

$t_e$ = $17\frac{1}{8} \ minutes$ - (3.75 + 10.5) minutes ≈ 2.8738 minutes

The rate of change of the divers elevation = (Final elevation - Initial elevation)/(Time taken)

∴ The rate of change of the divers elevation = ( $-8\frac{9}{10} \ feet$ - ( $-79\frac{9}{10} \ feet$ ))/(2.87 minutes) = 71/2.8738 ≈ 24.71 feet/minute to the nearest hundredth

The rate of change of the divers elevation ≈ 24.71 feet/minute.

8 0

2 years ago