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3 years ago

Find the perimeter of a rectangle that is 5three fourths in. by 7 in.

Mathematics

2 answers:

dimulka [17.4K]3 years ago

8 0

The perimeter is 25 2/4 in.

Novosadov [1.4K]3 years ago

8 0

The perimeter is 25.5 in.

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What is 5% of 345? ......

Karolina [17]

Answer:

17.25

Step-by-step explanation:

5/100 x 345 = 1725/100 = 17.25

7 0

3 years ago

5 minus the product of 2 and a number is 7 as a equation

mrs_skeptik [129]

Answer:

$2x - 5 = 7$

Step-by-step explanation:

product is the result of multiplication which means multiplication is involved with 2 and a number which can be substituted for x

5 is subtracted from all of that

7 is the answer of it all

5 0

4 years ago

In a solution,the ratio of salt water by volume is 1:4 .What is the percent of salt in the total solution?

mojhsa [17]

I believe its 20% salt to water ratio since theres 5 pieces all together

8 0

3 years ago

Solve -3x=2x^2-4 using quadratic formula

frozen [14]

Answer:

$x=-2.35078, 0.850781$

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Algebra I

Standard Form: ax² + bx + c = 0
Quadratic Formula: $x=\frac{-b\pm\sqrt{b^2-4ac} }{2a}$

Step-by-step explanation:

Step 1: Define equation

-3x = 2x² - 4

Step 2: Rewrite into Standard Form

0 = 2x² + 3x - 4

Step 3: Define variables

a = 2

b = 3

c = -4

Step 4: Find x

Substitute: $x=\frac{-3\pm\sqrt{3^2-4(2)(-4)} }{2(2)}$
Evaluate: $x=\frac{-3\pm\sqrt{9-4(2)(-4)} }{2(2)}$
Multiply: $x=\frac{-3\pm\sqrt{9+32} }{4}$
Add: $x=\frac{-3\pm\sqrt{41} }{4}$
Evaluate: $x=\frac{-3\pm6.40312}{4}$
Evaluate: $x=-2.35078, 0.850781$

And we have our final answer!

6 0

3 years ago

HELLP!!!! Please? HELPPP??

svet-max [94.6K]

1 - a) x^2+10=36

b)x^2=36

x=-6 OR x=6

2 - a) 2x^2-20=3x

b) 2x^2-3x-20=0

2x^2-8x+5x-20=0

(2x+5)(x-4)=0

x=-5/2 OR x=4

5 0

3 years ago