3 years ago

70 decreased by 80% in math

1 answer:

7 0

The answer for your math problem is 55.2. To get this, you do 70 times 0.80, which gives us 56. Then, subtract it by 0.80.

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If Steve's age is decreased by 12 years, and that difference is multiplied by 3, the result is 24 years. Find Steve's age.

kumpel [21]

Answer:

20 years old.

Step-by-step explanation:

Go backwards in the equation.

24/3 = 8

8+12

= 20

8 0

3 years ago

Kelly makes fruit juice each morning. She uses 2 1/3 pints of strawberries and 1 2/5 pints of grapes in her juice. How many more

Monica [59]

2 1/3 -1 2/5 =1 1/10

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3 years ago

Solve for x<br> -12 = 4(x – 5)<br> X =

bonufazy [111]

Answer:

-12=4x-20

4x=12+20

4x=32

4 = 4

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5 0

3 years ago

Which equation shows the quadratic formula used correctly to solve 5x2 + 3x – 4 = 0 for x? x = StartFraction negative 3 plus-or-

Brrunno [24]

Answer: FIRST OPTION

Step-by-step explanation:

<h3> The missing picture is attached.</h3>

By definition, given a Quadratic equation in the form:

$ax^2+bx+c=0$

Where "a", "b" and "c" are numerical coefficients and "x" is the unknown variable, you caN use the Quadratic Formula to solve it.

The Quadratic Formula is the following:

$x=\frac{-b \±\sqrt{b^2-4ac} }{2a}$

In this case, the exercise gives you this Quadratic equation:

$5x^2 + 3x - 4 = 0$

You can identify that the numerical coefficients are:

$a=5\\\\b=3\\\\c= - 4$

Therefore, you can substitute values into the Quadratic formula shown above:

$x=\frac{-b \±\sqrt{b^2-4ac} }{2a}\\\\x=\frac{-3 \±\sqrt{(3)^2-4(5)(-4)} }{2(5)}$

You can identify that the equation that shows the Quadratic formula used correctly to solve the Quadratic equation given in the exercise for "x", is the one shown in the First option.

6 0

3 years ago

Read 2 more answers

Given: x + 2y = -6.

wel

very positive about these results

4 0

3 years ago