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3 years ago

2(8x +9) -8(7-5x) Please can someone help

Mathematics

2 answers:

Paha777 [63]3 years ago

8 0

Answer:

56x-38

Step-by-step explanation:

2(8x+9)-8(7-5x)

16x+18

-8(7-5x)

-56+40x

16x+18-56+40x

Add all like terms

56x-38

Shkiper50 [21]3 years ago

6 0

Answer:16x + 18 -56+40x=0

16x+40x +18-56=0

56x-38=0

56x=38

X=19/28

Step-by-step explanation:

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Find the area, in SQUARE UNITS, of the parallelogram

mote1985 [20]

Answer:

80 square units

Step-by-step explanation:

Base = 10 units

Height = 8 units

Area of parallelogram

= base * height

= 10 * 8

= 80 square units

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3 years ago

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bob wants to lose weight. he currently weighs 220 pounds. on average he is losing 5 pounds per week by eating 1000 calories a da

Ksju [112]

Answer:

Nine weeks

Step-by-step explanation:

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3 years ago

the average wieght of three children a b and c is 60 lbs if another child D is included in the grouo in the place of C the avera

mars1129 [50]

The weight of the last child is 36 lbs.

<h3>How to calculate the mean?</h3>

The average weight of the three children is 60 lbs. The total weight will be:

= 60 × 3

= 180 lbs.

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= 54 × 4

= 216 lbs

The weight of the last child will be:

= 216 - 180

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2 years ago

Hey! Can someone check my answers?

Andrew [12]

The greatest common factor is the biggest number taken from the values.

Q1. The answer is <span>A. 5y^6
</span>
$20 y^{9} +5 y^{6}= 4*5 y^{9}+5 y^{6}$
Since $x^{a}* x^{b} =x^{a+b}$ , then $x^{9}= x^{3}* x^{6}$

Back to our expression:
$4*5 y^{9}+5 y^{6}=4*5 y^{3}*y^{6}+5 y^{6}=4 y^{3}*5y ^{6}+ 5y ^{6}*1=5 y^{6} (4y ^{3} +1)$
The greatest common factor is thus $5 y^{6}$

Q2. The answer is <span>D. 12xy^2
</span>
$12x y^{5}+60 x^{4} y^{2} -24 x^{3} y^{3}=12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}$
We will use the rule $x^{a}* x^{b} =x^{a+b}$ to factorise the exponents:
$12x y^{5}+5*12 x^{4} y^{2} -2*12 x^{3} y^{3}= \\ =12x*y^{2}*y^{3}+5*12*x* x^{3} *y^{2}-2*12x* x^{2} *y*y^{2}= \\ =12xy^{2}*y^{3}+12xy^{2}*5 x^{3} -12xy^{2}*2 x^{2} y= \\ =12xy^{2}(y^{3}+5 x^{3}-2 x^{2} y)$
The greatest common factor is thus $12xy^{2}$

3 0

4 years ago

Draw a suitable line on the grid and use your graphs to solve the equation 2/x - x^2 =5x

aivan3 [116]

Answer:

I graphed the answer above in the image

8 0

3 years ago