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3 years ago

10

To decrease an amount by 70%, what single multiplier would you use? How do i work this out?

1 answer:

serg [7]3 years ago

5 0

To decrease an amount, you would multiply it by 0.30. you multiply it by 0.30 because this gives you 30%; therefore, it has been decreased by 70%. To decrease an amount, you always times it by 0. and then whatever the remainder is. If you were decreasing 'y' by 65%, you would work it out by doing y * 0.35

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Help me with this Please.

sukhopar [10]

35
the ratio for the two is 5:7 and you want to find _:49. to get from 7 to 49 you multiply the 7 by 7. because you did that to one side you have to do the same to the other and multiply 5 by 7 which gives you 35

6 0

2 years ago

Use the angle relationship in the figure below to solve for x. Assume that lines a and b are parallel and the given angles are g

Daniel [21]

9514 1404 393

Answer:

x = 5°

Step-by-step explanation:

The marked angles are "alternate exterior angles," hence congruent.

2x +90° = x +95°

x = 5° . . . . . . . . . . . . subtract (x+90°) from both sides

4 0

2 years ago

Twelve percent of U.S. residents are in their forties. Consider a group of nine U.S. residents selected at random. Find the prob

miskamm [114]

Answer:

The probability is 28 % ( approx )

Step-by-step explanation:

Since, there are only two possible outcomes in every trails ( residents are in their forties or not ),

So, this is a binomial distribution,

Binomial distribution formula,

Probability of success in x trials,

$P(x)=^nC_x p^x q^{n-x}$

Where, $^nC_x=\frac{n!}{x!(n-x)!}$

p and q are probability of success and failure respectively and n is the total number of trials.

Let X be the event of resident who are in his or her forties.

Here, p = 12% = 0.12,

⇒ q = 1 - p = 1 - 0.12 = 0.88,

n = 9,

Hence, the probability that two or three of the people in the group are in their forties = P(X=2) + P(X=3)

$^9C_2 (0.12)^2 (0.88)^{9-2}+^9C_3 (0.12)^3 (0.88)^{9-3}$

$=36(0.12)^2 (0.88)^7+84(0.12)^3 (0.88)^6$

$=0.279266611163$

$\approx 0.28$

$=28\%$

7 0

3 years ago

What is f(-2) for f(x) = x^2+3x=5

leva [86]

f(x) = x^2+3x+5

f(-2) = (-2)^2 +3(-2)+5

f(-2) = 4-6+5

f(-2) = -2+5

f(-2) = 3

4 0

3 years ago

Read 2 more answers

Marcus is making homemade barbecue sauce. The recipe calls for 3 cups of ketchup for every 1/2 cup of mustard. What is the rate

Yuki888 [10]

Answer: 6 cups of ketchup per cup of mustard

Step-by-step explanation:

Given : The recipe calls for 3 cups of ketchup for every $\dfrac12$ cup of mustard.

That means , for $\dfrac12$ cup of mustard. we need 3 cups of ketchup.

By using proportions, if we multiply 2 on both sides ,we get

for $\dfrac12\times 2$ cup of mustard. we need $3\times 2$ cups of ketchup.

⇒ for $1$ cup of mustard. we need $6$ cups of ketchup.

Hence, the required rate = 6 cups of ketchup per cup of mustard

5 0

3 years ago