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2 years ago

Can someone help me please?

Mathematics

1 answer:

ANTONII [103]2 years ago

4 0

Answer:

ok i help you 11.28-99 is

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mrs xu lives 10.7 miles away from her place of work. she drives to work and back six days a week. how many miles does she travel

rewona [7]

Answer:

128.4 Miles

Step-by-step explanation:

She goes to work and goes 10.7 miles, and then goes back home aswell which is also 10.7 miles. So total miles in one day = 10.7 + 10.7 = 21.4 miles in one day.

so 1 week = 21.4 x 6

128.4 miles.

we times it by 6 because she works 6 days a week only.

hope it helped :)

5 0

3 years ago

A chemist working on a flu vaccine needs to mix a 20% sodium-iodine with a 60% sodium to obtain a 70-milliliter mixture.Write th

Verdich [7]

Answer:

$S(x)=-0.4x+42$

The value of S(50) is 22 in means the amount of sodium iodine in the mixture is 22 when 50 milliliters of the 20% solution used.

Step-by-step explanation:

It is given that a chemist working on a flu vaccine needs to mix a 20% sodium-iodine with a 60% sodium-iodine to obtain a 70-milliliter mixture.

Let x be the number of milliliters of the 20% sodium-iodine.

Number of milliliters of the 60% sodium-iodine = 70-x

The amount of sodium iodine in the mixture is 20% of x and 60% of (70-x).

$S(x)=0.20x+0.60(70-x)$

$S(x)=0.2x+42-0.6x$

$S(x)=-0.4x+42$

Therefore,the required function is $S(x)=-0.4x+42$ .

Substitute x=50 in the above equation.

$S(50)=-0.4(50)+42$

$S(50)=22$

The value of S(50) is 22 in means the amount of sodium iodine in the mixture is 22 when 50 milliliters of the 20% solution used.

4 0

4 years ago

A rider sits on a motorcycle. The mortorcycle has a mass of 237 kilograms. Thee rider has a mass of 89 kilograms. what is the to

Luba_88 [7]

The total mass is 326 kilograms.

7 0

3 years ago

Read 2 more answers

Halp asap plssssssssssssssssss

sashaice [31]

Answer:

a. $-56c+30$

Step-by-step explanation:

$4c+10\left(3-6c\right)$

Expand:

$4c+10\times3-10\times6c$

$4c+30-60c$

$4c-60c+30$

$-56c+30$

6 0

4 years ago

Evaluate without using a calculator (x2y-3)0+x1/3-(4x)1/2 when x = 64 and y = 27. Show work.

aleksley [76]

Given:

The expression is:

$(x^2y-3)^0+x^{\frac{1}{3}}-(4x)^{\frac{1}{2}}$

To find:

The value of the given expression when $x=64$ and $y=27$ .

Solution:

We have,

$(x^2y-3)^0+x^{\frac{1}{3}}-(4x)^{\frac{1}{2}}$

Putting $x=64$ and $y=27$ , we get

$=((64)^2(27)-3)^0+(64)^{\frac{1}{3}}-(4(64))^{\frac{1}{2}}$

It can be written as

$=((64)^2(27)-3)^0+(4^3)^{\frac{1}{3}}-(4)^{\frac{1}{2}}(64)^{\frac{1}{2}}$

$=1+4-2(8)$ $[\because a^0=1,a\neq 0]$

$=5-16$

$=-11$

Therefore, the value of the given expression $-11$ when $x=64$ and $y=27$ .

4 0

3 years ago