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4 years ago

14

Which statement is true about the difference 2 square root of 7 − square root of 26?

1 answer:

lora16 [44]4 years ago

7 0

2√7 - √26 ≈ 5.29150262213... - 5.09901951359...

... ≈ 0.19248310854...

The result is an irrational number not described by any of your answer selections.

None of the statements is true.

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Simplify (5^-2)^4 Please Help i don’t understand

Maslowich

Answer:

5^ -8 or 1/ 5^8

Step-by-step explanation:

(5^-2)^4

We know that a^b^c = a^(b*c)

(5^-2)^4 = 5^(-2*4) = 5^(-8)

We know that a^ - b = 1/ a^b

5^ -8 = 1/ 5^8

4 0

3 years ago

A waitress sold 16 ribeye steak dinners and 26 grilled salmondinners, totaling $596.12 on a particular day. Another day she so

JulijaS [17]

Answer:

(A) $14.30

(B) $14.13

Step-by-step explanation:

Let x represent cost of each ribeye steak dinner and y represent cost of each grilled salmon dinner.

(B) We have been given that a waitress sold 16 ribeye steak dinners and 26 grilled salmondinners, totaling $596.12 on a particular day. We can represent this information in an equation as:

$16x+26y=596.12...(1)$

We are also told that another day she sold 28 ribeye steak dinners and 13 grilled salmon dinners, totaling $584.01. We can represent this information in an equation as:

$28x+13y=584.01...(2)$

Now, we will use substitution method to solve our system of linear equations. From equation (1), we will get:

$x=\frac{596.12-26y}{16}$

Upon substituting this value in equation (2), we will get:

$28(\frac{596.12-26y}{16})+13y=584.01$

$1.75(596.12-26y)+13y=584.01$

$1043.21-45.5y+13y=584.01$

$1043.21-32.5y=584.01$

$-32.5y=584.01-1043.21$

$-32.5y=-459.2$

$y=\frac{-459.2}{-32.5}$

$y=14.12923\approx 14.13$

Therefore, cost of each grilled salmon dinner is $14.13.

(A) To find the cost of each ribeye dinner, we will substitute $y=14.12923$ in equation $x=\frac{596.12-26y}{16}$ .

$x=\frac{596.12-26(14.12923)}{16}$

$x=\frac{596.12-367.35998}{16}$

$x=\frac{228.76002}{16}$

$x=14.29750125\approx 14.30$

Therefore, the cost of ribeye steak dinners is $14.30.

3 0

4 years ago

What is the answer to this? 5b+3a+2b+2b=

Mashutka [201]

Answer:

9b+3a= ?

Step-by-step explanation:

You add the numbers with the same variable.

6 0

3 years ago

Elena is feeding her neighbor's dogs each dog gets two thirds cup of dog food and she uses three and one third cups of food how

MrRa [10]

Answer:

Total number of dogs is 5.

Step-by-step explanation:

Cups of food each dog gets= $\frac{2}{3}$

Here,each dog eats two-third cups of dog food.

Amount of dog food used= $\frac{10}{3}$

A total of three and one-third cups of food is used up.

Let the number of dogs be x.

To find the number of dogs,divide total dog food used by the amount of dog food eaten by each dog.

Hence, x = $\frac{\frac{10}{3} }{\frac{2}{3} }$

x = $\frac{10}{2}$

x =5

5 0

3 years ago

I need help on this ASAP pls 20 points

Semenov [28]

Answer:

1070cm2

Step-by-step explanation:

the cereal box represents a cuboid and it is closed hence a closed cuboid.

SA- Surface area

L- Length = 15

W- Width =4

H- Height =25

In a closed cuboid, there are going to be 6 faces( 3 pairs).

To find SA, we have to take the area of all faces and sum them up.

You can do this by carrying out the area of all faces and summing them up or you can use the formula:

SA of a closed cuboid=2(L x W) + 2(W x H) + 2(L x H)

= 2(15 x 4) + 2(4 x 25) + 2(15 x 25)

= 2(60) + 2(100) + 2(375)

=120 + 200 + 750

=<u>1070cm2</u>

4 0

3 years ago