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Igoryamba
3 years ago
13

Combine like terms.

Mathematics
2 answers:
coldgirl [10]3 years ago
8 0

Answer:

To solve the question the answer is 35y2 - 5 (i think)

Step-by-step explanation:

Yes and it's actually very simple.

To start off:

Simplify the equation: multiply 7 by the numbers in the parentheses getting: 28y2 - 35 .......full equation: 7y2 + (28y2 - 35)

New equation: 7y2 + (28y2 - 35) now combine like terms this means adding each common variable together. in this case, 7y2 and 28y2 would be added together to simplify the equation. Add them together, the new equation is: 35y2 - 5

Lmk if you have any questions i hope this helps

lutik1710 [3]3 years ago
6 0

Answer:

7y^2+7\left(4y^2-5\right)=35y^2-35

Step-by-step explanation:

Given the expression

7y^2+7\left(4y^2-5\right)

First Apply distributive law to expand 7(4y² - 5) :  a\left(b-c\right)=ab-ac

7y^2\:+7\left(4y^2\:-\:5\right)\:=7y^2+7\cdot \:\:\:4y^2-7\cdot \:\:\:5

simplify

                               =7y^2+28y^2-35

Add like terms:  7y²+ 28y²=35y²

                                =35y^2-35

Therefore,

7y^2+7\left(4y^2-5\right)=35y^2-35

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Please please help :)))
Viefleur [7K]

Answer:

Arc length = 0/360 x2πr

=120/360 x2πx6

=12π/3

= 12.57

6 0
3 years ago
2) Orion buys 3 books for a total of $25.50. He pays $8 plus sales tax for each book. He wants
aalyn [17]

Answer: I think the Sales tax is 0.5 because 0.5 X 3 is 1.5, He paid $24 in total for the books so you would do 24 + 1.5 and get 25.50, So it would have to be 0.5 sales tax for one book. Sorry about my English.

7 0
3 years ago
Two vectors and have the components, in meters, ax = 6.91, ay = 1.45, bx = 2.45, by = 7.02. (a) find the angle between the direc
White raven [17]
We are given
ax = 6.91
ay = 1.45

bx = 2.45
by = 7.02

So,
tan a→ = 1.45/6.91 = 0.2098 = ma
tan b→ = 7.02/2.45 = 2.8653 = mb

To get the angle between the two
tan θ = (mb - ma)/(1 + ma mb)
tan θ = (2.8653 - 0.2098) / (1 + (2.8653) (0.2098) )
θ = 58.91°
The x component is
x = 8.28 cos 58.91 = 4.28 m
The y component is
y = 8.28 sin 58.91 =  7.09 m
8 0
4 years ago
Help helphelpherllplpeleplpglhler
IRINA_888 [86]
1.) 10² + 4 · (6 + 3) - (27 ÷ 9) - 6 = 127 
For these types of questions, try to think of it like, well since the last number is negative 6, let me try to get everything before it to equal 133 so it will end up being 127. :)

2.) ( \frac{3}{5}  -  \frac{1}{2} ) ÷ \frac{1}{2} + 1.6·(0.3 + 0.42)
= 1/10 ÷ 1/2 + 1.6 · (0.72)
= 1/5 + 1.152
= 1.352
Remember that dividing a fraction by a fraction is like multiplying the coefficient of the second one to the original one.

3.) 15 · 1/2 ÷ 3/4
Remember that product is multiplication and quotient is division.

4.) \frac{(54 \frac{3}{10} - 11 \frac{7}{10}) }{3}
Remember that difference is subtraction and separating into three parts is like dividing it into three parts.


Hope this helped and ask me for further explanation! ^-^
5 0
4 years ago
The expression ax2-bx=0 is? and has the solution x=0
LUCKY_DIMON [66]
Lets analyze the equation:
<span>ax^2 - bx = 0
</span>x(ax - b) = <span>0
</span>Therefore if x = 0, the equation holds no <span>matter about a and b</span>:
0(0a - b) = 0
0 = 0

8 0
3 years ago
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