All categories

4 years ago

I need help!!!!!!!!!!!!!!

Mathematics

2 answers:

MAXImum [283]4 years ago

6 0

Answer:

I think that it is A

Step-by-step explanation:

just olya [345]4 years ago

5 0

Anwer:

A. By the definition of a perpendicular Bisector.

You might be interested in

There are two numbers which sum to 23. If one number is five less than three times the other, find the numbers.

Lilit [14]

Your answer is in the image.

8 0

3 years ago

The solution generated by the calculator is 5.779E–8. Describe how to interpret the solution.

Serga [27]

the E-8 at the end means the number is multiplied by 10^-8

so 5.779E-8=

5.779 x 10^-8 =

a negative power means move the decimal place that many places to the left

so 5.779 x 10^-8 =

0.00000005779

3 0

4 years ago

Read 2 more answers

I need help on nine and 10 instructions say to solve these equations by cross multiplying

Aneli [31]

Answer:

9. a = -1

10. b = 20

Step-by-step explanation:

The term "cross multiplying" is used to describe the appearance of the result of multiplying both sides of the equation by the product of the denominators. The result is the left numerator is multiplied by the right denominator, and the right numerator is multiplied by the left denominator. The property of equality that supports this is the multiplication property of equality, which tells you the values of the variables are unchanged if you multiply both sides by the same thing. That multiplier is chosen so that it cancels the denominators.

$\dfrac{2a-5}{3a-4}=\dfrac{2a-3}{3a-2}\\\\(3a-2)(2a-5)=(3a-4)(2a-3)\qquad\text{"cross multiply"}\\\\6a^2 -19a +10=6a^2-17a+12\qquad\text{expand}\\\\-2=2a\qquad\text{add $19a-6a^2-12$}\\\\\boxed{a=-1}\qquad\text{divide by 2}$

$\dfrac{b-2}{b-6}=\dfrac{b+2}{b-4}\\\\(b-4)(b-2)=(b-6)(b+2)\qquad\text{"cross multiply"}\\\\b^2-6b+8=b^2-4b-12\qquad\text{expand}\\\\20=2b\qquad\text{add $6b+12-b^2$}\\\\\boxed{b=20}\qquad\text{divide by 2}$

_____

<em>Additional comments</em>

Here are the answer checks:

9. (2(-1) -5)/(3(-1)-4) = (2(-1)-3)/(3(-1)-2) ⇒ -7/-7 = -5/-5 . . . yes

10. (10 -2)/(10 -6) = (10 +2)/(10 -4) ⇒ 8/4 = 12/6 . . . yes

Sometimes this method of solving the problem will result in extraneous solutions. Those will generally be values of the variable that make one or more of the denominators be zero. You must be careful to exclude those values from any possible solution set.

5 0

3 years ago

Is 7.232 bigger than 76.343

yanalaym [24]

No my answer is both are equally rate because in 7.232 move the decimal point right it will be 3 digit and do the same with 76.343 it will be 3 digit.
thank you. if any question commend.

4 0

3 years ago

If 100 people drink 1.5 cups of coffee a day and the cost per cup is .40 how much would it cost to provide coffee for the whole

N76 [4]

Answer:

It would cost <u>15600</u> to provide coffee for the whole year.

Step-by-step explanation:

Given:

If 100 people drink 1.5 cups of coffee a day and the cost per cup is .40

Now, to find the cost to provide coffee for the whole year if you're place is open 5 days a week.

So, we have the unit rate, and we have to find the cost of 1.5 cup by multiplying 0.40.

<em>1.5 cup of coffee cost </em> $1.5\times 0.40=0.60.$