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3 years ago

Can someone help me with this question?!?

Mathematics

1 answer:

NeTakaya3 years ago

7 0

Answer C
**
Last week she sold 90+210=300 items in total. This week, she sold 90*1.5+210*1.3=408 items. The percent increase in sales is (408-300)/300*100%=36%.

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if the expression 4x-3 is equal to 11 for some value of x, then what is the expressiom 4x-1 equal for the same value of x

marta [7]

Answer: 13

Step-by-step explanation:

Add 3 to each side. That original 3 is cancelled out so you're left with 4x=11. Divide each side by 4 and that leaves you with x = 3.5

Now all you have to do is multiply 4 by 3.5 which is 14. You now have to subtract 1 and your answer is 13.

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2 years ago

What is an equation of the line that passes through the points (-1, 6) (−1,6) and (-1, -5) (−1,−5)

slavikrds [6]

Answer:

x = -1

Step-by-step explanation:

You can write the equation of the line by finding the slope between the points and substitute it with a point into the point slope form.

$m = \frac{y_2-y_1}{x_2-x_1} = \frac{6--5}{-1--1} =\frac{11}{0} = und$

These points have a slope which is undefined. This means it is a vertical line that crosses through the x-axis at the x-coordinate of both points -1. The equation is x = -1.

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2 years ago

5 less than twice a number

TiliK225 [7]

Answer:

5 less than twice a number is 9. So, twice a number is 14.

3 0

2 years ago

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An arrow is shot vertically upward at a rate of 240 feet per second from ground level. Use the projectile formula to determine w

Juli2301 [7.4K]

Answer:

After 14.92 seconds, the arrow hits the ground.

Step-by-step explanation:

Given:

Initial velocity of the arrow is, $u=240\ ft/s or 73.152\ m/s$

The arrow goes up and come back to the same starting position. So, initial position is same as that of final position.

Therefore, displacement of the arrow is 0 m.

The displacement of the arrow is given as:

$s=ut-\frac{1}{2}gt^{2}$ (equation 1)

Plug all value in equation 1 and solve for $t$

$0=73.152\timests t-\frac{1}{2} \times9.8 \times t^{2}$

$0=73.152\timests t-4.9 \times t^{2}$

$0=t(73.152-4.9 \times t)$

$73.152-4.9\times t=0$ where $t\neq 0$

$4.9\times t=73.152$

$t=\frac{73.152}{4.9}= 14.92\ s$

∴ After 14.92 seconds, the arrow hits the ground.

5 0

3 years ago

Which best describes the dimensions of a plane?

n200080 [17]

Answer: C) 2 dimensions; flat surface of length and width, but no depth

One way to think of a plane is to think of a flat sheet of paper that extends infinitely in all directions. The paper must be kept flat without any bends.

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3 years ago

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