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3 years ago

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If a =5 and b=3 what is the value of the 2a-3b+3a

1 answer:

34kurt3 years ago

6 0

Answer:

If a = 5 and b = 3, then that means 2a - 3b + 3a = 16

Step-by-step explanation:

2a - 3b + 3a

(2×5) - (3×3) + (3×5)

10 - 9 + 15 = 16

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If one diagonal of a rhombus is 15 meters long and it’s area is 157.5 square meters, find the measures of the other diagonal

ycow [4]

Answer:

The other diagonal measures 21m

Step-by-step explanation:

In this question, we are tasked with calculating the length of the second diagonal of as Rhombus given the measure of the surface area of the rhombus and the length of the other diagonal

Mathematically, for a rhombus having two diagonals $d_{1}$ and $d_{2}$ , the area of the rhombus can be calculated mathematically using the formula below;

A = 1/2 × $d_{1}$ × $d_{2}$

From the question, we can identify that A = 157.5 $m^{2}$ and $d_{1}$ = 15m

we input these in the formula;

157.5 = 1/2 × 15 × $d_{2}$

315 = 15 $d_{2}$

$d_{2}$ = 315/15

$d_{2}$ = 21m

7 0

3 years ago

Caleb and Sarah are having a valentines party. They hay 3 1/2 pounds of candy to divide 14 goodie bags.How much candy will be in

antoniya [11.8K]

Answer:

0.25 pounds of candy

Step-by-step explanation:

3.5 divided by 14 is 0.25

3 0

3 years ago

Donna bought 3 pairs of pants for $28.50 each. She also bought a necklace for $12.25. She received a discount of 35% off her ent

oee [108]

Answer:

<em>Donna will have to pay $67.985125 at the register, including the 7% sales tax.</em>

Step-by-step explanation:

Donna bought 3 pairs of pants for $28.50 each.

So, the cost for 3 pair of pants $=(28.50\times 3)dollars= 85.50$ dollars.

She also bought a necklace for $12.25

Thus, the cost for her entire purchase will be: $(85.50+12.25) dollars = 97.75$ dollars.

She received a discount of 35% off her entire purchase. So, the amount of discount $=(97.75\times 0.35)= 34.2125$ dollars.

Thus, the total selling price will be: $(97.75-34.2125)= 63.5375$ dollars.

Percentage of sales tax is 7%. So, the amount of sales tax $=(63.5375\times 0.07)= 4.447625$ dollars.

Thus, the total amount Donna have to pay at the register $=(63.5375+4.447625)=67.985125$ dollars.

5 0

4 years ago

Solve 9x^2- 17x- 85 = 0 Give your solutions correct to 3 significant figures.

dybincka [34]

Answer:

$x =\frac{17}{18} +\frac{1}{18} \sqrt{3349}$ OR $x =\frac{17}{18} +\frac{-1}{18} \sqrt{3349}$

Step-by-step explanation:

9x2−17x−85=0

For this equation: a=9, b=-17, c=-85

9x2+−17x+−85=0

Step 1: Use quadratic formula with a=9, b=-17, c=-85.

$x =\frac{-b + \sqrt{b^{2}-4ac } }{2a}$

$x =\frac{-(-17)+\sqrt{(-17)^{2} -4(9)(-85)} }{2(9)}$

$x =\frac{17}{18} +\frac{-1}{18} \sqrt{3349}$

4 0

2 years ago

Please help I’ll mark you as brainliest if correct!<br><br> A<br> B<br> C<br> D

Andrei [34K]

Answer:

A is the answer

Step-by-step explanation:

8 0

3 years ago