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3 years ago

Plz help me on number 4 thank u so much math people

Mathematics

1 answer:

Anna [14]3 years ago

5 0

A)5.17
B)10.86
I hope this helps

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Write -9.27 as a mixed number

Murljashka [212]

Answer:

The answer is $-9\frac{27}{100}$

Step-by-step explanation:

The answer is in a mixed number form because there is 9 whole numbers and 27 out of 100 left so therefor, the answer is 9 27/100

6 0

4 years ago

10 people can paint a building in 5 days if each person paints as quickly as the others then how much of the building could 7 pe

Olenka [21]

Answer:

asdfasdfasdfasdf

Step-by-step explanation:

asdfasdfasdfsdafasdghyejhtrgerfEDQWeretwsRZEYTXRUTIF8O8IGOPO;LKFJDHSGARWewrtyu

4 0

3 years ago

|x+18|=1

zepelin [54]

The absolute value, or modulus, of a number is its distance from zero, or essentially its magnitude.

The absolute value produces a positive answer.

We have this definition for the absolute value, taking into account its different values for different signs:

$|x|= \left \{ {{x, \ \ \ x \ \geq \ 0} \atop {-x, \ \ \ x \ \ \textless \ \ 0}} \right.$

Thus, for $|x+18|=1$ , we split the absolute value as such:

$x+18=1$ and $x+18=-1$

We solve each case.

$x=-17$ and $x=-19$

We check these solutions.

$|-17+18|=1\\|1|=1\\1=1$
and
$|-19+18|=1\\|-1|=1\\1=1$

5 0

3 years ago

Read 2 more answers

A ball is thrown upward and outward from a height of 77 feet. the height of the ball, f(x), in feet, can be modeled by f left

Oksi-84 [34.3K]

From the given function modeling the height of the ball:
f(x)=-0.2x^2+1.4x+7
A] The maximum height of the ball will be given by:
At max height f'(x)=0
from f(x),
f'(x)=-0.4x+1.4
solving for x we get:
-0.4x=-1.4
x=3.5ft
thus the maximum height would be:
f(3.5)=-0.2(3.5)^2+1.4(3.5)+7
f(3.5)=9.45 ft

b]
How far from where the ball was thrown did this occur:
from (a), we see that at maximum height f'(x)=0
f'(x)=-0.4x+1.4
solving for x we get:
-0.4x=-1.4
x=3.5ft
This implies that it occurred 3.5 ft from where the ball was thrown.

c] How far does the ball travel horizontally?
f(x)=-0.2x^2+1.4x+7
evaluationg the expression when f(x)=0 we get:
0=-0.2x^2+1.4x+7
Using quadratic equation formula:
x=-3.37386 or x=10.3739
We leave out the negative and take the positive answer. Hence the answer 10.3739 ft horizontally.

6 0

4 years ago

A) Expand and simplify. 7(x - 2) - 2(x - 1) b) Factorise fully. 8x2 + 6x

cluponka [151]

Answer:

a). 5x - 12 b). 2x(4x + 3)

Step-by-step explanation:

a). 7(x - 2) - 2(x - 1)

= 7x - 14 - 2x + 2

= 5x - 12

b). 8x² + 6x

2x(4x + 3)

5 0

3 years ago