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3 years ago

A word problem for 7x +10y =100

Mathematics

1 answer:

aivan3 [116]3 years ago

4 0

Anwser: 100/17

Decimal term: 5.88235294

Mixed number: 5 15/17

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Please show work and correct answers ONLY!

amm1812

April 11 : 3 hours 15 minutes

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April 14 : 5 hours 15 minutes

April 15 : 2 hours 45 minutes

total : 18 hours 45 minutes

10.50 * 18.75 = $196.875

answer: $196.88

45 1/4-> 45.25 * .5 = 22.625 = 22 5/8

gusset plate :

5 3/4 -> 5.75 * .5 = 2.875 = 2 7/8

3 1/2 -> 3.5 * .5 = 1.75 = 1 3/4

47 1/4 -> 47.25 * .5 = 23.625 = 23 5/8

2 * .5 = 1

5 0

2 years ago

Solve for x in the equation.

labwork [276]

Answer:

The solution is $\displaystyle x=1\pm \sqrt{47}$ . Fourth option

Explanation:

Solve for x:

$2x^2+3x-7=x^2+5x+39$

Move all the terms from the right to the left side of the equation, a zero in the right side:

$2x^2+3x-7-x^2-5x-39=0$

Join all like terms:

$x^2-2x-46=0$

The general form of the quadratic equation is:

$ax^2+bx+c=0$

Solve the quadratic equation by using the formula:

$\displaystyle x=\frac{-b\pm \sqrt{b^2-4ac}}{2a}$

In our equation: a=1, b=-2, c=-46

Substituting into the formula:

$\displaystyle x=\frac{-(-2)\pm \sqrt{(-2)^2-4(1)(-46)}}{2(1)}$

$\displaystyle x=\frac{2\pm \sqrt{4+184}}{2}$

$\displaystyle x=\frac{2\pm \sqrt{188}}{2}$

Since 188=4*47

$\displaystyle x=\frac{2\pm \sqrt{4*47}}{2}$

Take the square root of 4:

$\displaystyle x=\frac{2\pm 2\sqrt{47}}{2}$

Divide by 2:

$\displaystyle x=1\pm \sqrt{47}$

First option: Incorrect. The answer does not match

Second option: Incorrect. The answer does not match

Third option: Incorrect. The answer does not match

Fourth option: Correct. The answer matches exactly this option

8 0

3 years ago

Grant is paining a rectangular board that has a width of 1/3 foot. He has enough paint to cover 3 square feet. If he is able to

k0ka [10]

The Answer Should be 1

4 0

3 years ago

Anyone know what the answer is for this

Anika [276]

Answer:

x^9

Step-by-step explanation:

If we have x^2 * x^3 we have (x * x) * (x * x * x) = x * x * x * x * x = x^5 which demonstrates that x^a * x^b = x^(a+b), 4 + 5 = 9

6 0

3 years ago

Read 2 more answers

A math thing<br> 1. 3x + 2 = x + 4

aleksandrvk [35]

Answer:

X=1

This is correct due to basic algebra

3 0

3 years ago

Read 2 more answers