All categories

2 years ago

7(2 + 3) − 4 · 2 2 the second two is up in the air fyi

Mathematics

1 answer:

AfilCa [17]2 years ago

7 0

Answer:

Step-by-step explanation:

7(2 + 3) − 4 · 2² ← like that right so

parenthesis first add the numbers up↓

7(5) - 4 · 2²

write number in exponential form↓

7(5) - 2²· 2²

multiply↓

35 - 2² · 2²

calculate the product↓

35 - 2⁴

evaluate the power↓

35-16

then subtract↓

You might be interested in

Solve the inequality. |4x + 2| < 26

balu736 [363]

Hello,
Answer D

1) if 4x+2>0 then |4x+2|=4x+2
==> 4x+2<26
==>4x<24
==>x<6

2) if 4x+2<0 then |4x+2|=-(4x+2)=-4x-2

==>-4x-2<26
==>-4x<28
==>x>-7

thus -7<x<6

8 0

2 years ago

Sydney’s teacher says she may have her report card percentage based on either the mean or the median and she can drop one test s

Yuri [45]

Answer:

I'm jus gonna guess 94 if right brainliest plzzz

4 0

3 years ago

Read 2 more answers

Certain tubes manufactured by a company have a mean lifetime of 800 hours and a standard deviation of 60 hours. Find the probabi

Anna71 [15]

Answer:

Step-by-step explanation:

given that certain tubes manufactured by a company have a mean lifetime of 800 hours and a standard deviation of 60 hours.

Sample size n =16

Std error of sample mean = $\frac{\sigma}{\sqrt{n} } \\= 15$

x bar follows N(800, 15)

the probability that a random sample of 16 tubes taken from the group will have a mean lifetime

(a) between 790 and 810 hours,

= $P(790$

(b) less than 785 hours

$=P(X$

, (c) more than 820 hours,

$=P(X>820)\\=p(Z>1.333)\\= 0.0913$

(d) between 770 and 830 hours

= $P(|Z|$

4 0

2 years ago

A group of 10 students participate in chess club, karate club, or neither

oksano4ka [1.4K]

Answer:-0

Step-by-step explanation:

8 0

2 years ago

Someone please help me I only have until January 18th to turn this in. Question: Mr Lopez picks up 2 pallets of dog food to deli

miv72 [106K]

Answer:

Mr. Lopez delivers 1.5 tons of dog food to the animal shelter.

Step-by-step explanation:

Mr Lopez picks up 2 pallets of dog food to deliver to the animal shelter. Each pallet contains 40 bags of dog food, and the dog food weighs 37 1/2 pounds pet bag.

The weight of 1 bag of dog food = $37\frac{1}{2}\text{ pounds }$

The weight of 40 bags of dog food = $40 \times 37\frac{1}{2} =1500 \text{ pounds }$

Each pallet weighs = 1500 pounds

2 pallets weighs = 1500×2=3000 pounds.

We know that 2000 pounds = 1 ton

$\frac{3000}{2000} \text{ pounds}=1.5 \text{ tons}$

Hence, Mr. Lopez delivers 1.5 tons of dog food to the animal shelter.

6 0

3 years ago