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2 years ago

Need help because I don't understand

Mathematics

1 answer:

marusya05 [52]2 years ago

6 0

-5&2

X^2-6x+9x+9-19=0
X^2+3x-10
(X+5)(X-2)
X+5=0x-2=0
X= -5. X=2

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If you currently have $300 set aside for the trip and you're only able to save $75 a week, write an inequality representing how

algol13

Answer:

see the explanation

Step-by-step explanation:

In this problem

I will assume that the total amount required for the trip is $1,200

Let

x ----> the number of weeks

we know that

The number of weeks multiplied by $75 plus $300 must be at least $1,200

In this context, the term "at least" means "greater than or equal to"

The linear inequality that represent this problem is

$75x+300\geq 1,200$

Solve for x

subtract 300 both sides

$75x\geq 1,200-300$

$75x\geq 900$

Divide by 75 both sides

$x\geq 12\ weeks$

therefore

The minimum number of weeks you need to save is 12

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3 years ago

(5 x 10^4) (9.46 x 10^12) in scientific notation

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Answer:

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3 years ago

13x=-21-6y and -8x=36+6y

IgorLugansk [536]

Answer:

$x=3\\y=-10$

Step-by-step explanation:

$13x=-21-6y\\-8x=36+6y$

Let's take one of the equations and solve for x. I'll take the first one.

$13x=-21-6y$

Divide by 13.

$x=\frac{-21-6y}{13}$

Now replace x in the second equation.

$-8x=36+6y\\-8(\frac{-21-6y}{13} )=36+6y$

Distribute -8

$\frac{168+48y}{13}=36+6y$

Break down the fraction.

$\frac{168}{13}+\frac{48}{13}y=36+6y$

Subtract $\frac{168}{13}$

$\frac{48}{13}y=36+6y-\frac{168}{13}$

Subtract 6y

$\frac{48}{13}y-6y=36-\frac{168}{13}$

Combine like terms;

$\frac{48-13*6}{13}y=\frac{36*13-168}{13}$

Solve;

$\frac{48-78}{13}y=\frac{468-168}{13}$

Keep solving;

$\frac{-30}{13}y=\frac{300}{13}$

Multiply by the negative reciprocal of the fraction next to y.

$(-\frac{13}{30} )\frac{-30}{13}y=\frac{300}{13}(-\frac{13}{30} )$

On the right side; 13 and 13 become 1. 300/30 = 30/3 = 10

$y=-10$

After having found y, replace it in any of the equations to find x.

$13x=-21-6y\\13x=-21-6(-10)\\13x=-21+60\\13x=39\\x=\frac{39}{13}\\ x=3$

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2 years ago

Read 2 more answers

Question 12 helllllllppppp plazzzzzzz

Eddi Din [679]

Answer:

Step-by-step explanation:

It says Renita takes minutes to ride half a mile.

She leaves 30 minutes before school.

Total distance is

$2\frac{1}{2} = \frac{1}{2}+ \frac{1}{2} +\frac{1}{2} +\frac{1}{2} +\frac{1}{2}\\$

$2\frac{1}{2} \ there \ are \ 5 \ times \ \frac{1}{2} \ mile .\\$

Therefore total time to reach school will be 5 x 5 = 25minutes.

Since she leaves 30minutes before school. She will reach 5minutes early before school.

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2 years ago

What is 6÷by a missing number =27?

Dimas [21]

6/x=27
times both sides by x
6=27x
divide both sides by 27
6/27=x
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the missing number is 2/9

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2 years ago