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3 years ago

:)

Mathematics

2 answers:

emmasim [6.3K]3 years ago

5 0

D. 140 cm, because 5 x 4=20 and 20 x 7 is 140.

Korvikt [17]3 years ago

3 0

The answer will be D.

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I WILL GIVE BRILLIANT

Katyanochek1 [597]

Answer:

The answer is 43.27, 27, and 10.58

Step-by-step explanation:

First you add 24.39 to 5.99 and get 30.38 then add 12.89 to that and get 43.27.

The second problem you add 15.4 to 11.6 and get 27 degrees.

The third one you subtract 16.92 from 27.5 and get 10.58.

7 0

3 years ago

78. Use properties of exponents to rewrite each expression as either an integer or as a quotient of integers p/q to show the exp

kolezko [41]

Answer:

4√2 × 4√8 = 64, an integer.

Step-by-step explanation:

a) 4√2 × 4√8

First let's remember that a square root can be rewritten as a 1/2 exponent,

Therefore the expression we have can be rewritten as

$4(2^{1/2} )4(8^{1/2})$

We are going to write all numbers in their prime factor expressions:

*Note: Remember that when we multiply two numbers with the same base but different exponents we sum up the exponents*

*Also, when we elevate one exponent to another exponent, we multiply the exponents*

$4(2^{1/2} )4(8^{1/2})\\=2^2 (2^{1/2})2^2 (2^{3})^{1/2} \\ =2^2 (2^{1/2})2^2 (2^{3/2})\\=2^22^2(2^{1/2}2^{3/2})\\=16(2^{4/2})\\=16(2^2)\\=16(4)\\=64$

Therefore, the expression 4√2 × 4√8 = 64 and therefore is an integer

4 0

3 years ago

What is 2x + (-2x) + 4 + (-3) ? PLS ILL MARK BRAINLIST AND 50 POINTS

BabaBlast [244]

Answer:

General Formulas and Concepts:

Algebra I

Combining Like Terms

Step-by-step explanation:

Step 1: Define Expression

2x - 2x + 4 - 3

Step 2: Simplify

Combine like terms (x): 4 - 3
Combine like terms (Z): 1

8 0

3 years ago

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You are told to make a new image with a scale factor of 1 or 100%. How would the new image look

AURORKA [14]

Answer:

the size would remain the same

Step-by-step explanation:

100% of something means nothing has decreased or increased, no changes to original

6 0

3 years ago

A cyclist rode at an average speed of 15 mph for 30 miles. How long was the ride? Question 6 options: 0.5 hours 1 hour 2 hours 3

Rus_ich [418]

Answer:

2 hours

Step-by-step explanation:

using the relationship

distance = speed × time, then

time = $\frac{distance}{speed}$ = $\frac{30}{15}$ = 2 hours

6 0

3 years ago

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