3 years ago

Help please maths please

Mathematics

1 answer:

FinnZ [79.3K]3 years ago

4 0

Im not very good at math so i apologize

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Factor f(x) = 4x^2 − 5x − 21

jeka94

Answer:

x = -7/4, 3

Step-by-step explanation:

Use quadratic formula

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3 years ago

What’s the length of the mid segment of a trapezoid with bases of length 16 and 24

blagie [28]

Answer:

Step-by-step explanation:

The midsegment of a trapezoid is calculated as

$\frac{sumofbases}{2}$ = $\frac{16+24}{2}$ = $\frac{40}{2}$ = 20

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3 years ago

Wyatt has 32 marbles in his collection. Twenty of his marbles are red, four are blue, and the

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Answer:

6 and 2/5

Step-by-step explanation:

20% of 32 is 6.4

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3 years ago

A certain large manufacturing facility produces 20,000 parts each week. The manager of the facility estimates that about 1% of t

Slav-nsk [51]

Answer:

198 is the variance for the number of defective parts made each week.

Step-by-step explanation:

We are given the following in the question:

Number of parts produced each week = 20,000

Percentage of defective parts = 1%

We have to calculate the variance for the number of defective parts made each week.

We treat defective part as a success.

P(Defective part) = 1% = 0.01

$p = 0.01$

Then the number defective parts follows a binomial distribution .

Formula for variance =

$\sigma^2 = np(1-p) = 20000(0.01)(1-0.01) = 198$

Thus, 198 is the variance for the number of defective parts made each week.

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4 years ago

Manuel bought x x movie tickets for $6.50 each and y y bags of popcorn for $2.50 each. write an algebraic expression for the tot

Alekssandra [29.7K]

6.50x+2.50y = total
with x = # of movie tickets
with y= # of bags of popcorn

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4 years ago