MATHEMATICS MIDDLE SCHOOL

How to turn y-2x=7 into y=mx+b

Answers

Answer 1

Answer:

Answer:

y = 2x + 7

Step-by-step explanation:

y -2x = 7

move 2x to other side by adding to both sides

y = 2x +7

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Karina rows a boat downstream for 66 miles. The return trip upstream took 16 hours longer. If the current flows at 4 mph, how fast does Karina row in still water?

Answers

Answer:

7 mph

Step-by-step explanation:

Let x be the speed in still water hence

Time to move downstream will be $\frac {66}{x+4}$

Time to move upstream will be $\frac {66}{x-4}$

Difference will be

$\frac {66}{x-4}-\frac {66}{x+4}=16$

$66(x+4)-66(x-4)= 16(x^(2)-16)$

$66x+264-66x+264=16x^(2)-256$

$16x^(2)-256-528=0$

$x^(2)-16-33=0$

$x^(2)=49$

x=7

The moon is about 240,000 miles from Earth.What is this distance written as a whole number multiplied by a power of ten? SHOW YOUR WORK!! 15 points if u ANWSER NOW!!! HURRY BEFORE QUESTION DELETED

Answers

The answer is 24 multiplied by 10 to the power of 4

A right triangle has the leg lengths of 3X and 40 and a hypotenuse of length 5X. How long are the sides?

Answers

Answer:

Hypotenuse = 10 units

Step-by-step explanation:

According to the Pythagoras theorem:

${hyp}^(2) = {(one \: leg) }^(2) + {(other \: leg)}^(2) \n \therefore \: {(5x)}^(2) = {(3x)}^(2) + {40}^(2) \n \therefore \: {25x}^(2) = {9x}^(2) + 1600 \n \therefore \: {25x}^(2) - {9x}^(2)= 1600 \n \therefore \: {16x}^(2)= 1600 \n \therefore \: {x}^(2)= (1600)/(16) \n \therefore \: {x}^(2)= 100 \n \therefore \: {x}= 10 \n$

Hence, length of hypotenuse = 10 units.

How many yards are in 60 feet

Answers

There are yards that are present in 60 feet will be 20.

We must be aware of the fact that 3 feet equals 1 yard in order to convert feet to yards. By dividing 60 by 3, we can calculate how manyyards there are in 60 feet.

20 yards are equal to 60 feet times three.

Consequently, 20 yards are equal to 60 feet. The idea behind this conversion is that one yard is equivalent to three feet. We may get the corresponding number in yards by multiplying the provided measurement in feet by the conversion ratio of 3. 20 yards are equivalent to 60 feet in this situation.

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ6

there are 20 yards in 60 feet.

do 60/30=20 that is your answer

hope that helps

What is the value of 35−3m , when m = 4 pls help quick worth 20 ptsA.1

B.13

C.23

D.128

What is the value of 1 + x ÷ 5, when x = 80
give your answer below

Answers

The value of $35-3m$ , when m = 4 is equal to: C. 23.

Given the following data:

$35-3m$

m = 4

To find the value of the given equation when m is equal to 4:

In this exercise, you're required to find the value of the algebraic expression. In order to this, we would substitute the value of m into the algebraic expression.

Substituting the value of m into the expression, we have;

$35-3m$

$35 - 3(4) = 0\n\n35 - 12 = 23$

Therefore, the value of $35-3m$ , when m = 4 is equal to 23.

Find more information: brainly.com/question/596290

35-3m
35- 3×4
35-12
=23

1+x/5
1+80/5
1+16
=17

Find an equation of the line that (a) has y-intercept of -8 and (b) is parallel to the line 6 x − 1 y = 7 6x-1y=7 . Write your answer in the form y = m x + b y=mx+b .