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3 years ago

You had $21 to spend on three pens .After buying them you had $12 how much did each pen cost

Mathematics

1 answer:

Black_prince [1.1K]3 years ago

7 0

I thinks it’s 3 because 21-12=9 so you spent 9 dollars 9/3=3

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5 + 0.55x = 10 + 0.75x pls help and explain

inysia [295]

Step-by-step explanation:

hope it is helpful to you

3 0

2 years ago

Read 2 more answers

Choose SSS, SAS, or neither to compare

Oliga [24]

$▪▪▪▪▪▪▪▪▪▪▪▪▪ {\huge\mathfrak{Answer}}▪▪▪▪▪▪▪▪▪▪▪▪▪▪$

According to above figure, we can conclude that :

The given triangles are congruent by SSS criteria.

8 0

2 years ago

A triangular pyramid has a right triangle for its base. The perpendicular sides of the triangle are 10 inches and 18 inches long

igor_vitrenko [27]

The formula for a triangular pyramid is 1/3AH. A is the area of the base. H is the height of the pyramid. So to find the area of a right triangle, you would use the formula (a x b)/2. So (10 x18)/2 is 90 inches^2. Now you can fill in the first formula. 1/3(90 x 14), which equals 420 inches^3. I hope you find this helpful (if correct.)

6 0

3 years ago

-x < - 29 solve for x

AleksAgata [21]

Answer:

x<29

Step-by-step explanation:

divide both sides by -1 since x cannot be negative

4 0

3 years ago

Find the arc length of the 3/4 of a circle with a radius of 5

IgorLugansk [536]

Answer:

7.5 pi

Step-by-step explanation:

The formula for arc length of a sector is denoted as

$\frac{x}{360}2\pi r$ , where x is the central angle of the sector.

Since the sector is 3/4 of a circle, the central angle will be 3/4 of 360 degrees.

3/4 of 360 is 270, so we have our central angle. We also have our radius which we can plug into the formula.

$\frac{270}{360}2(5)\pi$

2 times 5 is equal to 10, and 270/360 simplifies to 3/4. 3/4 times 10 is equal to 7.5, so the answer is 7.5 pi

3 0

2 years ago