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3 years ago

I will give you BRAINLIEST for the correct answer

Mathematics

1 answer:

Alekssandra [29.7K]3 years ago

8 0

6 x 18 x 20 = 2,160 divided by 3 equals 720

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Plss help i beg you!

frosja888 [35]

Answer:

Step-by-step explanation:

Given expression:

3(x + y) +2x² + (1 + y)²

Find its value when x = 4 and y = 1, substitute:

3(4 + 1) + 2*4² + (1 + 1)² =
3*5 + 2*16 + 2² =
15 + 32 + 4 =
51

7 0

2 years ago

I really need help and reallly fassttttttt

Vikki [24]

Answer:

1: 1.06c−10

2: 0.048c−9.2

3: 0.8c(1.06)

Step-by-step explanation:

Brainliest pleasee

7 0

3 years ago

The price of a refrigerator is 2,199.99 for an 18 month loan. If a $300 down payment has been made, what is the monthly payment?

Troyanec [42]

Answer:

This is verry easy! Is 105.56,do u need expabation?

7 0

2 years ago

pls help will give brainliest Rena used the steps below to evaluate the expression (StartFraction (x Superscript negative 3 Base

kaheart [24]

Answer:

First "order of operations" mistake: step 2

First arithmetic mistake: step 4

Step-by-step explanation:

As we understand Rena's work, she wants to simplify ...

$\left(\dfrac{x^{-3}y^{-2}}{2x^4y^{-4}}\right)^{-3}$

for x = -1 and y = 2.

Her work seems to be ...

Step 1

$\text{Substitute $x=-1$ and $y=2$ into the expression}\\\\\left(\dfrac{(-1)^{-3}2^{-2}}{2(-1)^42^{-4}}\right)^{-3}\qquad\text{no error}$

Step 2

$\text{Simplify the parentheses}\\\\\left(\dfrac{2^4}{2(-1)^4(-1)^32^2}\right)^{-3}=\left(\dfrac{2^2}{2(-1)^7}\right)^{-3}\qquad\text{order of operations error}$

Step 3

$\text{Evaluate the power to a power}\\\\\dfrac{2^{-6}}{2^{-3}(-1)^{21}}\qquad\text{no error}$

Step 4

$\text{Use reciprocals and find the value}\\\\\dfrac{1}{2^32^6(-1)^{21}}=\dfrac{1}{8\cdot 64\cdot (-1)}=\dfrac{-1}{512}\qquad\text{error: $2^3$ is used instead of $2^{-3}$}$

_____

So, the first arithmetic error is in Step 4. However, the order of operations requires exponents be evaluated first. Doing that makes step 2 look like ...

$\left(\dfrac{-\dfrac{1}{4}}{2(1)\dfrac{1}{16}}\right)^{-3}=(-2)^{-3}\qquad\text{proper Step 2}$

We expect your answer is supposed to be Step 4.

7 0

3 years ago

How many feet are in 40 inches

Solnce55 [7]

Answer:

3.33

Step-by-step explanation:

4 0

3 years ago