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3 years ago

Someone please help I will mark brainliest!!!!

Mathematics

1 answer:

Iteru [2.4K]3 years ago

6 0

Answer:

I think the answer are C, B, C, and A.

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PLEASE HELP QUICK!!

AVprozaik [17]

Answer:

28 miles in 1.4 hours in the city

Step-by-step explanation:

On the highway:

Time $=t$ hours

Rate = 45 mph

Distance $=45\cdot t$ miles

In the city:

Time $=3-t$ hours

Rate = 20 mph

Distance $=20\cdot (3-t)$ miles

The trip was 100 miles long, then

$45t+20(3-t)=100\\ \\45t+60-20t=100\\ \\45t-20t=100-60\\ \\25t=40\\ \\t=1.6\ hours\\ \\3-t=3-1.6=1.4\ hours$

Distance on the highway $=45\cdot 1.6=72$ miles

Distance in the city $=20\cdot 1.4=28$ miles

6 0

4 years ago

Match each linear equation to its slope and y-intercept.

Alex Ar [27]

Answer:

-x + 5y = 4

5y = x + 4

y = x/5 + 4/5

Slope: 1/5

Y-intercept: 4/5

5y - x = 15

5y = x + 15

y = x/5 + 3

Slope: 1/5

Y-intercept: 3

2y - 3x = 7

2y = 3x + 7

y = 3/2x + 7/2

Slope: 3/2

Y-intercept: 7/2

2y = 5x + 7

y = 5/2x + 7/2

Slope: 5/2

Y-intercept: 7/2

8 0

3 years ago

Angle A?? Ch.7.1 trig

Tju [1.3M]

9514 1404 393

Answer:

m∠A =86°

Step-by-step explanation:

The sum of angles in a triangle is 180°

A + B + C = 180°

A + 51° + 43° = 180°

A = 86° . . . . . . . . . . . . . subtract 94° from both sides

6 0

3 years ago

What are the factors of -100 that will = zero?

Karolina [17]

Answer:0

Step-by-step explanation:

Because it is a 0

7 0

4 years ago

Find the sum. 2.680 34.200 +20.386

Talja [164]

Answer: 57.266

Align all the decimal point and do the operation required.

8 0

4 years ago

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