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2 years ago

Please help meee!!!!

Mathematics

1 answer:

marusya05 [52]2 years ago

8 0

Step-by-step explanation:

I answered that already.

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If 1/4 of the 7th graders got an A on the test and 2/5 of them got a B, that fraction of the students got an A or B?

posledela

Answer: $\dfrac{13}{20}$

Step-by-step explanation:

Given: Fraction of 7th graders got A = $\dfrac14$

Fraction of 7th graders got B = $\dfrac25$

The fraction of the students got an A or B = Fraction of 7th graders got + Fraction of 7th graders got B

$=\dfrac14+\dfrac25\\\\=\dfrac{5+2(4)}{5\times4}\\\\=\dfrac{5+8}{20}\\\\=\dfrac{13}{20}$

Hence, the required fraction: $\dfrac{13}{20}$

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3 years ago

Simplify the expression 4-2(7+9)+4

julia-pushkina [17]

Answer:

4-2(16)+4

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

A basketball player is fouled while attempting to make a basket and receives two free throws. The opposing coach believes there

zzz [600]

Answer:

$P(X = 0) = 0.64$

$P(X = 1) = 0.11$

$P(X = 2) = 0.25$

b) 0.75 = 75% probability that he makes no more than one of the shots

Step-by-step explanation:

We have these following probabilities:

64% = 0.64 probability that he misses both shots, that is, makes none of them.

11% = 0.11 probability that he makes one shot.

25% = 0.25 probability that he makes both shots.

a. Construct the appropriate probability distribution. (Round your answers to 2 decimal places.)

Binomial probability distribution, in which P(X = x) is the probability of making x shots. So

$P(X = 0) = 0.64$

$P(X = 1) = 0.11$

$P(X = 2) = 0.25$

b. What is the probability that he makes no more than one of the shots? (Round your answer to 2 decimal places.)

$P(X \leq 1) = P(X = 0) + P(X = 1) = 0.64 + 0.11 = 0.75$

0.75 = 75% probability that he makes no more than one of the shots

7 0

4 years ago

Saffron had some beads. On monday she gave half of her beads to her sister. On tuesday, she used 14 of her remaining beads to ma

muminat

(957-426+14)x2
(531+14)x2
545x2
=1090

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3 years ago

The measure of an angle is 63 degrees. What is the measure if it’s supplement

Gala2k [10]

The measure of it's supplement is 117. You do 180 minus 63 and that makes 117.

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4 years ago