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3 years ago

Which strategy can be used to multiply 6 x 198 mentally?

Mathematics

1 answer:

djverab [1.8K]3 years ago

8 0

The box method or latitude or longitude.

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mr.mcbride asks students to find the volume of the triangular pyramid below. which student wrote the correct expression for the

Black_prince [1.1K]

Given:

Given that the height of the pyramid is 20 inches.

The sides of the triangle are 9 in, 12 in and 15 in.

The expression for the area of the base written by JO is $\frac{1}{2}(9 \cdot 15)$

The expression for the area of the base written by MAE is $\frac{1}{2}(9 \cdot 12)$

We need to determine the correct expression for the area of the base written by the student.

Expression for the area of the base:

The area of the base of the triangular prism can be determined using the formula,

$B=\frac{1}{2}bh$

where b is the base of the triangle and h is the height of the triangle.

From the figure, the base of the triangle is 9 inches and the height of the triangle is 12 inches.

Substituting in the above formula, we get;

$B=\frac{1}{2}(9 \cdot 12)$

Thus, the correct expression for the area of the base is $B=\frac{1}{2}(9 \cdot 12)$

Hence, the expression wrote by MAE is correct.

8 0

3 years ago

How do i find the perimeter of a diamond? Will name brainest

d1i1m1o1n [39]

Answer:

Step-by-step explanation:

Find the length of one of the diamond's sides and multiply the length by 4 to calculate the diamond's perimeter.

8 0

4 years ago

Read 2 more answers

Correct answer and detailed explanation pls!!!

natali 33 [55]

Answer:

Step-by-step explanation:

3 0

3 years ago

Read 2 more answers

A game room has a floor that is 120 feet by 75 feet. A scale drawing of the floor on grid paper uses a scale of 1 unit:5 feet. W

kirill [66]

Answer:

24 by 15 units

Step-by-step explanation:

This is one of those portions problems.

For this problem, I would keep in mind that 120 and 75 are measured in FEET.

1 unit on the paper is 5 feet

All you would have to do it divide 120/5 which is 24 and 75/5 which is 15.

Sooo the dimensions of the drawing are 24 units (NOT FEET, just units) by 15 units.

8 0

3 years ago

What is the average rate of change for f(x) = 2 ^ x - 12 over the interval 4 <= x <= 8

Naddika [18.5K]

Answer:

The everage rate of change over the interal 4 ≤ x ≤ 8 will be: 60

Step-by-step explanation:

Given the function

$f\left(x\right)\:=\:2^x-\:12\:\:\:$

Interval : 4 ≤ x ≤ 8

Interval = [4, 8]

at x₁ = 4, f(x₁) = 2ˣ - 12 = 2⁴ - 12 = 16-12 = 4

at x₂ = 8, f(x₂) = 2ˣ - 12 = 2⁸ - 12 = 256 - 12 = 244

Using the formula to determine the average rate of change over the interval 4 ≤ x ≤ 8 wil be:

Average rate = [f(x₂) - f(x₁)] / [ x₂ - x₁]

= [244 - 4] / [8-4]

= 240 / 4

= 60

Therefore, the everage rate of change over the interal 4 ≤ x ≤ 8 will be: 60

4 0

3 years ago