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AnnyKZ [126]
3 years ago
10

Expand (3x + 4)(2x – 5)

Mathematics
1 answer:
avanturin [10]3 years ago
4 0

Answer:

6x^2-7x-20

Step-by-step explanation:

Use the FOIL method: (a+b)(c+d)= ac+ad+bc+bd

6x^2-15x+8x-20

Collect like terms:

6x^2+(-15x+8x)-20

Simplify:

6x^2-7x-20

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Solve system by using substitution: 5x + 3y = -4 <br> y - 2x = 6
horrorfan [7]

Answer:

x = -11/3, y = -4/3

Step-by-step explanation:

y-2x=6\\y = 2x + 6

3(2x + 6) = -4\\6x + 18 = -4\\6x = -22\\x = -11/3

3y = -4\\y = -4/3

5 0
3 years ago
Whats the y intercept of y=4x -3
AleksAgata [21]

Answer:

-3

Step-by-step explanation:

the y intercept is the number that does not have a variable behind it (3)

the slope is the number that does have a variable behind it (4)

6 0
3 years ago
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25^9+5^17 is divisible by 30.
miskamm [114]

Answer:

1.5 x 10↑11

Hopefully that helps.

8 0
3 years ago
Recall that two angles are complementary if the sum of their measures is​ 90°. find the measures of two complementary angles if
maxonik [38]
If one angle is 8 times bigger than the other, the bigger angle's measure would be 8x and the smaller angle's measure would be x. 8x+x=90. This simplifies to 9x=90. To find x, you divide 9 from 90, making x=10. This means the smaller angle (Angle 2) is 10° and the bigger angle's (Angle 1) is 8 times 10, so it is 80°.
8 0
3 years ago
I was at the store, and saw two sizes of avocados being sold. The regular size sold for $0.84 each. For what prices would the la
JulsSmile [24]

Answer:

The bigger avocado will be a better deal if the ratio of the sizes of the bigger one to the smaller one is less than the ratio of the prices of the bigger one to the smaller one.

Step-by-step explanation:

Given that two sizea of avocados are being sold, since the regular size is being sold for $0.84 each, let the price for the bigger avocado be $x.

Then note the following:

1. How bigger than the smaller avocado is the bigger one?

This would determine if the price for the bigger one is a bargain, or a mistake.

If for instance, the bigger avocado is double the size of the smaller one, then for any price, $x less that $1.68 (twice of $0.84), it is a bargain.

The bigger avocado will be a better deal if the ratio of the sizes bigger one to the smaller one is less than the ratio of the prices of the bigger one to the smaller one.

6 0
3 years ago
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