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2 years ago

HURRY ASAP I NEED THIS RIGHT NOW

Mathematics

2 answers:

Yuri [45]2 years ago

8 0

Answer:

5(x+4) =30

-multiply 5 and x then multiply 5 and 4

- That gives you 5x+20=30

-subtract 20 from 30 and positive 20 that gives you 5x=30

-divide 5x by 5 that cancels each other out

-divide 30 by 5 that gives you x=6

-4(3x+2)=32

-multiply -4 by 3x that gives you -12x

-then multiply -4 by positive 2 that gives you -8

-now you have -12x-8=32

-add both sides by 8

- -12x=40

- divide 12x by 12 that cancels each other out

- divide 40 by 12

- that gives you 3.3 (repeating)

1/2(9x+15) =20

-multiply 1/2 by 9x that gives you 4.5x

-multiply 1/2 times 15 that gives you 7.5

- 4.5x+7.5=20

- subtract both sides by 7.5

-4.5x=20

- divide both sides by 4.5

- 4.5x divided by 4.5 cancels out

- 20 divided by 4.5 gives you 4.4 (repeating)

-4(1.5-x) =9

-multiply -4 by 1.5 that gives you -2.6

- multiply -4 by -x that gives you 4

- -2.6+4=9

- subtract both sides by 4

- 2.6x= 5

- divide 2.6x by 2.6 that cancels each other out

- divide 5 by 2.6 that gives you 1.9

(sorry I took so long Hope this helps!)

brilliants [131]2 years ago

3 0

Answer:

x=3.75

Step-by-step explanation:

-4(1.5-x)=9

first distribute

6-4x=9

then isolate the variable

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Solve the system of inequalities to decide if the point (-3,2) is part of the solution; y<=-4x-3, +8y>=7

inna [77]

Answer:

$(x,y) = (-3,2)$ is a solution

Step-by-step explanation:

Given

$y \le -4x + 3$

$x + 8y \ge 7$

Required

Determine if $(x,y) = (-3,2)$ is a solution

$y \le -4x + 3$ becomes

$2 \le -4 * -3 + 3$

$2 \le 15$ --- this is true

$x + 8y \ge 7$

$-3+ 8 * 2 \ge 7$

$13 \ge 7$ --- this is also true

Hence,

$(x,y) = (-3,2)$ is a solution

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2 years ago

Mika can eat 212121 hot dogs in 666 minutes. She wants to know how many minutes (m)(m)left parenthesis, m, right parenthesis it

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3 years ago

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6. Find the value of r in the following triangle.

makkiz [27]

Answer:

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Step-by-step explanation:

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2 years ago

The sum of two numbers is 14. The first number is 2/5 of the second number. What are the numbers?

zlopas [31]

Answer:

4 and 10

Step-by-step explanation:

To solve this problem, we need to find all the numbers between 1 and 13 that have a sum of 14. The list is shown below:

1 + 13, 2 + 12, 3 + 11, 4 + 10, 5 + 9, 6 + 8, 7 + 7

Now we must figure out which set of numbers include one number that is 2/5 of the value of the other. We can do that by turning the sets of numbers into fractions as shown below:

$\frac{1}{13}\neq \frac{2}{5}$

$\frac{2}{12}\neq \frac{2}{5}$

$\frac{3}{11}\neq \frac{2}{5}$

$\frac{4}{10}= \frac{2}{5}$ (answer)

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$\frac{6}{8}\neq \frac{2}{5}$

$\frac{7}{7}\neq \frac{2}{5}$

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3 years ago

Candace had scores of 94, 83, 92, and 86 on her first four exams of the semester. What score must she obtain on the fifth exam t

USPshnik [31]

Answer:

A score of 95 she must obtain on the fifth exam to have an average of 90 or better for the five exams

Step-by-step explanation:

average = sum of all terms / number of terms

average = 94 + 83 + 92 + 86 + x / 5

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subtract 355 from both sides to get x alone

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