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2 years ago

HELPP!!! Which expression is equivalent to

Mathematics

1 answer:

abruzzese [7]2 years ago

7 0

Answer:

answer is the first option

Step-by-step explanation:

double checked all and the first one is the correct one

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5x 8 = 23 what is x in the equation

ivann1987 [24]

Hope this helps x= 23/40

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2 years ago

Karin wants to use the distributive property to mentally find the value of 19⋅42+19⋅58. Which expression can she use?

devlian [24]

Answer:

$19( 42+ 58)$

Step-by-step explanation:

$19 \cdot 42+19 \cdot 58\\$

The common factor is 19

$19( 42+ 58)$

3 0

3 years ago

Read 2 more answers

A gallery has 25 paintings in its permanent collection, with display space for 10 at one time. How many different collections ca

Anastaziya [24]

You need to know in how many ways you can choose 10 out of 25 items when order does not matter. This is a combination problem.

$_{n}C_{r} = \dfrac{n!}{(n - r)!r!}$

$_{25}C_{10} = \dfrac{25!}{(25 - 10)!10!}$

$_{25}C_{10} = \dfrac{25 \times 24 \times 23 \times 22 \times 21 \times 20 \times 19 \times 18 \times 17 \times 16 \times 15!}{15! \times 10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}$

$_{25}C_{10} = \dfrac{25 \times 24 \times 23 \times 22 \times 21 
\times 20 \times 19 \times 18 \times 17 \times 16}{10 \times 9 \times 8 \times 7 \times 6 \times 5 \times 4 \times 3 
\times 2 \times 1}$

$_{25}C_{10} = \dfrac{23 \times 11 \times 20 \times 19 \times 2 \times 17}{1}$

$_{25}C_{10} = 23 \times 11 \times 20 \times 19 \times 2 \times 17$

$_{25}C_{10} = 3,268,760$

6 0

3 years ago

Read 2 more answers

Factor the expression. 2x^2-7x-15

lutik1710 [3]

Answer:

Factor by grouping

(2x+3) (x-5)

Step-by-step explanation:

3 0

3 years ago

According to the table, what is the relative

krok68 [10]

Answer:

About 67%

Step-by-step explanation:

This is a conditional relative frequency. There are 36 students who are aged 14-17 and 24 of them skip breakfast. Therefore, the answer is 24/36 = 2/3 ≈ 67% (ans)

3 0

2 years ago