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Brrunno [24]
2 years ago
12

Simplify (a+3)-2(4+a)+5a_4​

Mathematics
1 answer:
Rainbow [258]2 years ago
5 0

Answer:

it is 4a-9....................

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A rectangle has a perimeter of 35 1 half feet. If the length is 12 feet, what is the area of the rectangle?
Bess [88]

Answer:

The area of the rectangle is 69 feet squared.

Step-by-step explanation:

8 0
3 years ago
write an equation of the perpendicular bisector of the line segment whose endpoints are (-1,1) and (7,-5)
gladu [14]
Find midpoint of segment.
(-1,1), (7,-5)
x= \frac{-1+7}{2}=3,y= \frac{1+(-5)}{2}=-2

Find slope of line which passes through (-1,1) and (7,-5).
m= \frac{-5-1}{7-(-1)}= \frac{-6}{8}=- \frac{3}{4}

The slope of perpendicular line is negative reciprocal value of m.
m_{\perp}=- \frac{1}{m} =- \frac{1}{- \frac{3}{4} } = \frac{4}{3}

Write quation of line which slope is \frac{4}{3} and passes throug the point (3,-2).
m=\frac{4}{3},x_1=3,y_1=-2
\\y-y_1=m(x-x_1)
\\
\\y-(-2)=\frac{4}{3}(x-3)
\\
\\y+2=\frac{4}{3}x-\frac{8}{3}
\\
\\3y+6=4x-8
\\4x-3y-14=0

3 0
3 years ago
Which of these changes in today's world is a product of advances in biology?
zavuch27 [327]
"Increased crop yields" is the one change in today's world among the choices given in the question that <span>is a product of advances in biology. The correct option among all the options that are given in the question is the first option. I hope that this is the answer that has come to your desired help.</span>
5 0
3 years ago
I really need some help it's hard to understand
Naddik [55]

Answer:

the answer is a- 60

Step-by-step explanation:

A triangular prism has three rectangular sides and two triangular faces. To find the area of the rectangular sides, use the formula A = lw, where A = area, l = length, and h = height. To find the area of the triangular faces, use the formula A = 1/2bh, where A = area, b = base, and h = height.

6 0
3 years ago
The skating rink rented 218 pairs of skates during the month of April and 3 times that many in May. How many pairs of skates did
Marrrta [24]

Answer: Total number of pairs =872

Step-by-step explanation:

Since we have given that

Number of pairs of  skates during the month of April =218

Number of pairs of skates during the month of May =3 × 218=654

As we know that total means altogether in which we perform the additive operation.

Total pairs of skates the skating rent during April and May = 218+654=872

∴ Total number of pairs =872

7 0
3 years ago
Read 2 more answers
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