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3 years ago

Brainliest!

Mathematics

2 answers:

liq [111]3 years ago

8 0

Answer:

x = 64 mph

Step-by-step explanation:

512 = 8x

x = 512 / 8

x = 64

Hope that helps!

frosja888 [35]3 years ago

3 0

The answer is x=64 because you have to divide 512 and 8.

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The relationship between you shoe size and the length of you foot L ( in inches) is given by S = 3L - 22 for men and S = 3L - 21

andreev551 [17]

For the shoe size be equal to the length of the foot, this means that L must be equal to S. Now, since we have different equations depending on your gender, we first check the conditions for man.

Since S = 3L - 22 for men, for a person to have a foot length equal to his shoe size, we equate L to S as shown below.

L = S
L = 3L - 22
2L = 22
L = 11

Thus, we can see that men with 11-inch foot would have the same shoe size number. We can apply similar approach to find the length of a woman's foot that satisfies our conditions as shown.

L = S
L = 3L - 21
2L = 21
L = 10.5

Hence, a woman with a 10.5-inch foot have 10.5 for a shoe size as well.

Answer:

man: 11 inches
woman: 10.5 inches

6 0

3 years ago

Can someone help me solve these systems using elimination? I have a hard time with these.

Tcecarenko [31]

Question 1:

For this case we must solve the following system of equations by the method of elimination:

$8x-6y=-20\\-16x+17y=30$

We multiply the first equation by 2:

$16x-12y = -40$

We have the equivalent system:

$16x-12y = -40\\-16x + 17y = 30$

We add the equations:

$5y = -10$

We divide between 5 on both sides of the equation:

$y = - \frac {10} {5}\\y = -2$

We find the value of the variable "x":

$8x-6 (-2) = - 20\\8x + 12 = -20\\8x = -20-12\\8x = -32$

We divide by 8 on both sides of the equation:

$x = - \frac {32} {8}\\x = -4$

Thus, the solution of the system is:

$(x, y): (- 4, -2)$

Answer:

$(x, y): (- 4, -2)$

Question 2:

For this case we must solve the following system of equations by the method of elimination:

$-4y-11x = 36\\20 = -10x-10y$

We multiply the first equation by 10:

$-40y-110x = 360$

We multiply the second equation by -4:

$40y + 40x = -80$

We have the equivalent system:

$-40y-110x = 360\\40y + 40x = -80$

We add the equations: $-70x = 280$

We divide by -70 on both sides of the equation:

$x = \frac {280} {- 70}\\x = -4$

We find the value of the variable "y":

$-4y-11 (-4) = 36\\-4y + 44 = 36\\-4y = 36-44\\-4y = -8$

We divide between -4 on both sides of the equation:

$y = - \frac {8} {- 4}\\y = 2$

Thus, the solution of the system is:

$(x, y): (- 4,2)$

Answer:

$(x, y): (- 4,2)$

6 0

3 years ago

Elise fills a waffle cone with ice cream exactly level to the top of

Alik [6]

Answer:

V=π r^2 h/3

d=2 3/8 inches

convert to radius d=2r

d=2.375 (value of 2 3/8 inches in decimal)

2.375 divide by 2

r=1.1875 inches

V=π r^2 h/3

V=3.14 x 1.1875^2 x 6/3

Volume will be 8.85.

Step-by-step explanation:

8 0

3 years ago

Please Help Me, It's Due Tomorrow. (7th Grade Math)

ratelena [41]

In order to find the slope of the line, we can pick two points on the line and plug them into the slope equation (y2-y1)/(x2-x1)
two points could be (-3,-3) and (0,-1)
slope = (-1 - -3)/(-3-0) = 2/3
an equation for the line can be written using the slope and the y intercept (y value when x=0)
y = (2/3)x - 1
to find the a and b values look at the graph along the x and y axis. you can also count 2 points up and 3 points left from (0,-1) until you reach that point since it has the same slope. a=3, b=1
the y coordinate when x=0 is -1 because that is the y intercept

7 0

2 years ago

The graph represents the ways Janelle can win the beanbag toss game. Which describes a way Janelle can win the game? land on rou

Butoxors [25]

Answer:

Land on round 4 times; land on square 4 times

Step-by-step explanation:

5 0

3 years ago

Read 2 more answers