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3 years ago

I need helppppppp plzzzzz

Mathematics

1 answer:

Norma-Jean [14]3 years ago

6 0

Answer:

Step-by-step explanation:

4x + 15 = 3

Subtract 15 from both sides

4x + 15 - 15 = 3 - 15

4x = -12

Divide both sides by 4

4x/4 = -12/4

x = -3

Check:

substitute x = -3 in the LHS of the equation,

4*(-3) + 15 = -12 + 15

= 3 = RHS

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The picture is what I need help with PLS HURRY

erma4kov [3.2K]

Answer: $2.70\ quarts\approx3\ quarts$

Step-by-step explanation:

The area of a rectangle can be calculated with this formula:

$A_r=lw$

Where "l" is the lenght and "w" is the width.

And the area of triangle can be found with this formula:

$A_t=\frac{bh}{2}$

Where "b" is the base and "h" is the height.

First:

- Convert inches to feet:

$(30\ in)(\frac{1\ ft}{12\ in})=2.5\ ft$

- Convert the mixed number to decimal number:

$30\frac{1}{10}=30+0.1=30.1$

You can identify that the ramp is formed by three rectangles and two equal right triangles.

Since the bottom of the ramp does not have to be stained, you need to find:

1. The area of the smaller rectangle:

$A_1=(2.5\ ft)(6\ ft)=15\ ft^2$

2. The area of the larger rectangle on the top:

$A_2=(30.1\ ft)(6\ ft)=180.6\ ft^2$

3. The area of the triangles:

$A_3=A_4=\frac{(30\ ft)(2.5\ ft)}{2}=37.5\ ft^2$

Add the areas:

$Total=15\ ft^2+180.6\ ft^2+37.5\ ft^2+37.5\ ft^2=270.6\ ft^2$

Since a quart of stain covers $100 ft^2$ , for $270.6\ ft^2$ you need to buy:

$\frac{270.6}{100}=2.70\ quarts\approx3\ quarts$

8 0

3 years ago

Q #8 please solve my question

stealth61 [152]

The 2nd one. The one that says CD=DA, DA=ZX, AC=YZ

3 0

3 years ago

Read 2 more answers

Please help with at least one of these ( I accept 1 answer if you have it; make sure you are 100% positive its correct though!)

Trava [24]

So I know some of them but not all them sorry

5. If m<5=70 then m<6= 20

Why? Because there is a 90 degree angle there and if m<5 is 70 all you have to do to get m<6 is subtract 70 from 90 and you get 20 degrees

6. If m<5=70 then m<1= 90  and m<4=90 

Why? Because you can see based on the drawing that they form right angles

4a. FGK is right angles

4b. The measure of FGK is 90 in total

Why? It has the right angle

Hope this helps:) this was all I could remember

8 0

3 years ago

Can someone help plz ill give brainiest

Whitepunk [10]

Answer:

402.123859659

Step-by-step explanation:

first we use A=πr2

this gives us A = 16π

Then multiply by 8 to get 128π

128π = 402.123859659

7 0

2 years ago

What is the equivalent fraction of 56/8

zhenek [66]

The answer is 7/1 or just 7

8 0

3 years ago

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