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3 years ago

What is the GCF of 70 and 90

2 answers:

8 0

Write out the factors of 70 and 90 and see which factor is common between the two. If there is more than one, choose the greatest one.

vodomira [7]3 years ago

7 0

The GCF and GCD are both 10 (70, 90) = 10

You might be interested in

Y < 3 includes three as a possible solution

irakobra [83]

False...it does not include 3....it includes only numbers less then 3.

For it to include 3, u would need an equal sign in there..
Y < = 3...(thats less then or equal)...this would include 3

6 0

3 years ago

The height of a tennis ball tossed into the air is modeled by h(x) = 40x â€" 16x 2, where x is elapsed time in seconds. During w

egoroff_w [7]

The time interval x >0.5 and x > 2.04 will the tennis ball be at least 15 feet above the ground.

Given that,

The height of a tennis ball tossed into the air is modeled by,

$\rm h(x) = 40x - 16x^2$

Where x is elapsed time in seconds.

We have to determine,

During what time interval will the tennis ball be at least 15 feet above the ground?

According to the question,

The height of a tennis ball tossed into the air is modeled by,

$\rm h(x) = 40x - 16x^2$

Where x is elapsed time in seconds.

Then,

When the tennis ball be at least 15 feet above the ground,

$h(x) = 15$

Substitute the value of h(x) in the equation,

$\rm h(x) = 40x - 16x^2\\\\ 15 = 40x - 16x^2\\\\ 16x^2-40x+15=0$

Factorize the equation for finding the time interval will the tennis ball be at least 15 feet above the ground is,

$\rm 16x^2-40x+15= 0\\\\x = \dfrac{-b\pm \sqrt{b^2-4ac}}{2a}\\\\x = \dfrac{-(-40)\pm \sqrt{(-40)^2-4 \times 16 \times 15}}{2 \times 16}\\\\x = \dfrac{-(-40)\pm \sqrt{1600- 960}}{32}\\\\x = \dfrac{40\pm \sqrt{640}}{32}\\\\x = \dfrac{40 + 25.29}{32} \\\\x = \dfrac{40 + 25.29}{32} \ and \ x = \dfrac{40 - 25.29}{32}\\\\x = \dfrac{65.29}{32} \ and \ x = \dfrac{14.71}{32}\\\\x = 2.04 \ and \ x = 0.45$

Hence, The time interval x >0.5 and x > 2.04 will the tennis ball be at least 15 feet above the ground.

For more details about Inequality refer to the link given below.

brainly.com/question/17177510

7 0

3 years ago

Can a triangle can have sides with lengths 2.7, 3.5, and 9.8.

blagie [28]

Answer: No

Step-by-step explanation:

2.7 + 3.5 is not greater than 9.8.

8 0

3 years ago

Read 2 more answers

Evaluate the expressions

likoan [24]

<h3>Answer:</h3>

1. x + 20

2. 0

3. 2x - 8

4. 95x + 10

5. -9x - 6

6. 4x + y - 5

7. -x + 6y + 5

8. x + y - 15

9. x + 4y + 4

<h3>Step-by-step explanation:</h3>

• When working with variables and numbers, you have to put the variables first (in alphabetical order) and then the numbers.

• To evaluate an algebraic expression, we find the value of the expression when the variable is replaced by a given number.

• To evaluate an expression, we substitute the given number for the variable in the expression and then simplify the expression using the order of operations.

• When we are not given a number for the variable in the expression, we have to group like-terms.

<u>Example:</u> 5x + 6 + 3x - 2 - y

1st: group 5x and 3x (add the terms together) = 8x
2nd: group 6 and -2 (add the terms together) = 4
3rd: Since -y has no like-terms, we can't group it = -y
Fourth, put the terms in order (variables = alphabetical order and then numbers) = 8x - y + 4

1. 4x + 12 - 3x + 8

4x - 3x = 1x = x
12 + 8 = 20
x + 20

2. -8x + 1 + 2x - 1 + 6x

-8x + 2x + 6x = -8x + 8x = 0
1 - 1 = 0
0

3. 4x - 3 - 2x - 5

4x - 2x = 2x
-3 - 5 = -8
2x - 8

4. 100x + 5 - 5x + 5

100x - 5x = 95x
5 + 5 = 10
95x + 10

5. -4x - 4 - 2 - 5x

-4x - 5x = -9x
-4 - 2 = -6
-9x - 6

6. 2x - 1 + 2x - 4 + y

2x + 2x = 4x
-1 - 4 = -5
4x + y - 5

7. 5y - x + 2y - y + 5

5y + 2y - y = 5y + 1y = 6y
-x + 6y + 5

8. -15 + 3y - 3x - 2y + 4x

3y - 2y = 1y = y
-3x + 4x = 1x = x
x + y - 15

9. 4 - 3y + 3x - 2x - y

-3y - y = 4y
3x - 2x = 1x = x
x + 4y + 4

Hope I helped you, if I did can you please mark me the Brainliest?

4 0

3 years ago

George took a test with a certain number of questions. Each question had the same value. He answered 10 questions incorrectly, w

stepan [7]

10 questions = 40%

X question = 100%

40x = 1000

X = 25 questions

3 0

3 years ago