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3 years ago

99 PLZ HELP BRAINLIEST Which strategy would not correctly solve this story problem?

Mathematics

1 answer:

Verdich [7]3 years ago

4 0

Answer:

is this all apart of the answers or separate questions??

Step-by-step explanation:

1. B

2.C

3.C

4.A

5.D

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Jesse bought 10 more pencils than erasers. A pencil costs $0.15 and an eraser costs $0.22. He paid a total of $4.46. How many er

VARVARA [1.3K]

“Jesse bought 10 more pencils than erasers” means P = 10 + E

“A pencil costs $0.15” means that $0.15*P was spent on pencils

“an eraser costs $.22” means that $0.22*E was spent on erasers

“He paid a total of $4.46” means that $0.15*P + $0.22*E = $4.46

15*(10+E) + 22*E = 446

150 + 37E = 446

37E = 296

E = 8 Jesse bought 8 erasers

8 0

3 years ago

Evaluate the function. f(x) = 3x² – x Find f(10)

kirill [66]

Answer:

f(10)=290

Step-by-step explanation:

Function Evaluation

Given a function f(x) as an explicit expression, finding f(x=a) implies substituting the value of x by a in every instance it occurs.

We are given the function:

$f(x)=3x^2-x$

It's required to find f(10). We replace the x for 10:

$f(10)=3*10^2-10$

Operating:

$f(10)=3*100-10$

$f(10)=300-10$

$f(10)=290$

Thus, f(10)=290

4 0

3 years ago

Simplify <img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B6%5D%7B5%7D%20%20%5Ctimes%20%20%5Csqrt%5B2%5D%7B5%7D%20%20%3D%20" id

jek_recluse [69]

Step-by-step explanation:

$\sqrt[6]{5} \times \sqrt[2]{5}$

$= {5}^{ \frac{1}{6} } \times {5}^{ \frac{1}{2} }$

$= {5}^{ \frac{1}{6} + \frac{1}{2} }$

$= {5}^{ \frac{1 + 3}{6} }$

$= {5}^{ \frac{4}{6} }$

$= {5}^{ \frac{2}{3} }$

$= \sqrt[3]{ {5}^{2} } (ans)$

5 0

3 years ago

PLEASE HELP ME WITH THIS!!! 25 POINTS ALSO PLEASE TRY TO ANSWER A AND B

professor190 [17]

Step-by-step explanation:

____________________

5 0

3 years ago

There are 30 balls numbered 1-30 in a bag. One is randomly selected 12 times. What is the probability of getting a prime number

Sliva [168]

Answer: The probability of getting a prime number exactly five times = 0.1908

Step-by-step explanation:

Prime numbers from 1 to 30 are 2,3,5,7,11, 13, 17, 19, 23, 29.

The probability of getting a prime number p= $\dfrac{10}{30}=\dfrac13$

Number of trials n = 12

Binomial probability formula:

$P(X=x) = \ ^nC_x p^x(1-p)^{n-x}$

, where x= number of successes

n= number of trials.

x = Number of successes

p= probability of getting one success.

The probability of getting a prime number exactly five times:

$P(X=5)=\ ^{12}C_5(\frac13)^5(1-\frac13)^{7}$

$=\frac{12!}{5!7!}(\frac1{243})(\frac{128}{2187})\\\\=0.1908$

Hence, the probability of getting a prime number exactly five times = 0.1908

4 0

3 years ago