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4 years ago

Describe the number 78 in two different ways

Mathematics

2 answers:

attashe74 [19]4 years ago

8 0

78 could be seventy-eight, 78 over 1, and 78/1.

MA_775_DIABLO [31]4 years ago

8 0

Step-by-step explanation:

In expanded form, we can describe a number ABC as follows.

$ABC = A \times 10^2 + B \times 10^1 + C \times 10^0$

Therefore, 78 can be described in expanded form as follows.

78 = $7 \times 10 + 8$

= 78

Also, we can describe 78 in words as seventy eight.

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Select the equation that represents the function given in the table below.

masya89 [10]

Answer:

Step-by-step explanation:

The answer is D

y=1/2x-8

Take x=-6

Y=1/2(-6)-8=-11

Take X=-2

Y=1/2(-2)-8=-9

Take X=4

Y=1/2(4)-8=-6

Take X=8

Y=1/2(8)-8=-4

7 0

3 years ago

I need help on nine and 10 instructions say to solve these equations by cross multiplying

Aneli [31]

Answer:

9. a = -1

10. b = 20

Step-by-step explanation:

The term "cross multiplying" is used to describe the appearance of the result of multiplying both sides of the equation by the product of the denominators. The result is the left numerator is multiplied by the right denominator, and the right numerator is multiplied by the left denominator. The property of equality that supports this is the multiplication property of equality, which tells you the values of the variables are unchanged if you multiply both sides by the same thing. That multiplier is chosen so that it cancels the denominators.

$\dfrac{2a-5}{3a-4}=\dfrac{2a-3}{3a-2}\\\\(3a-2)(2a-5)=(3a-4)(2a-3)\qquad\text{"cross multiply"}\\\\6a^2 -19a +10=6a^2-17a+12\qquad\text{expand}\\\\-2=2a\qquad\text{add $19a-6a^2-12$}\\\\\boxed{a=-1}\qquad\text{divide by 2}$

$\dfrac{b-2}{b-6}=\dfrac{b+2}{b-4}\\\\(b-4)(b-2)=(b-6)(b+2)\qquad\text{"cross multiply"}\\\\b^2-6b+8=b^2-4b-12\qquad\text{expand}\\\\20=2b\qquad\text{add $6b+12-b^2$}\\\\\boxed{b=20}\qquad\text{divide by 2}$

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<em>Additional comments</em>

Here are the answer checks:

9. (2(-1) -5)/(3(-1)-4) = (2(-1)-3)/(3(-1)-2) ⇒ -7/-7 = -5/-5 . . . yes

10. (10 -2)/(10 -6) = (10 +2)/(10 -4) ⇒ 8/4 = 12/6 . . . yes

Sometimes this method of solving the problem will result in extraneous solutions. Those will generally be values of the variable that make one or more of the denominators be zero. You must be careful to exclude those values from any possible solution set.

5 0

3 years ago

PLEASE HELP ME I AM BEING TIMED, I WILL MARK BRAINLIEST TO WHOEVER GETS THIS RIGHT

Strike441 [17]

Answer:

2m-44

Step-by-step explanation:

this is the answer

7 0

3 years ago

The function f(x) = 60x + 4 represents the amount of money Mike earns making custom tables. The function g(x) = 2x - 4 represent

siniylev [52]

Answer:

$244

Step-by-step explanation:

f(x) = 60x + 4 and g(x) = 2x-4

We are told to find f(g=4), when Mike makes four tables.

We have to put replace x in f(x) with the value g(x) when x is 4, like this:

f(x) = 60x + 4 // Replace x with g(x) = 2x-4

f(x) = 60(2x-4) + 4

f(x) = (120x - 240) + 4 // Solve

f(x) = (120*4 - 240) +4 // They tell us x=4

f(x) = 480 - 240 + 4 = $244

3 0

4 years ago

Read 2 more answers

Attachment no explanation only answer

ruslelena [56]

Answer:

y=x+1

Step-by-step explanation:

The slope intercept form of a line is y=mx+b, where m is the slope of the line and b is the y intercept. Since the line rises one unit for every one unit it moves to the right, it has a slope of 1. Since it intersects the y axis at the point (0,1), it has a y intercept of 1. Therefore, the equation is y=x+1. Hope this helps!

7 0

3 years ago

Read 2 more answers