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Serhud [2]
3 years ago
14

What is the value of the expression below when x = 7?5x - 7​

Mathematics
2 answers:
gulaghasi [49]3 years ago
7 0

Answer:

28 is the answer

Step-by-step explanation:

5(7)= 35

35-7=28

Zina [86]3 years ago
4 0

Answer:

28

Step-by-step explanation:

5x -7\\x =7

Substitute 7 for x in the given equation

5x -7\\\\= 5(7) -7\\\\= 35-7\\\\= 28

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A mechanic makes $350 /week. If 20% of his income is deducted for taxes, how muchd id the mechanic bring home as pay?
klemol [59]

Answer:

$280

Step-by-step explanation:

Step one

Given data

A mechanic makes $350 /week

20% of his income is deducted for taxes

Required

the mechanic's take-home pay for the week

Step two:

let us find 20% of $350

=20/100*350

= 0.2*350

=$70

Therefore the take-home pay is

= 350-70

= $280

8 0
3 years ago
Am I correct? Please explain!<br><br> Will mark brainliest
marta [7]

Answer:

nr. 1 and 3 is a Dilation 2 and 4 are not Dilations

Step-by-step explanation:

Dilation is an elnargment or shink of a figure by a x(factor) that makes the SAME image but smaller or larger

4 0
3 years ago
For every 3 hours she works, Alexia earns $20.40.
kirill [66]
3x = 20.40. Divide each side by 3.
x = 6.8
she earns $6.8 per hour
5 0
3 years ago
Find the average rate of change of the function over the given intervals. f(x) = 12x3 + 12; [5,7]
AlladinOne [14]
<span>average rate of change = (f(7) - f(5)) / (x7 - x5)
</span>f(7) = <span>12 (7^3) + 12 = 4128
f(5) = </span>12 (5^3) + 12 = 1512

so
average rate of change = (4128 - 1512)/(7-5)
average rate of change = 2616 / 2
average rate of change = 1308

hope it helps
7 0
3 years ago
Find AB when given angle B 64 degress angle C 75 degrese and side a 19
jeka94

Answer:

about 28

Step-by-step explanation:

you have to use the sine rule = side you know * ( sin of angle opposing the side you want to know / sin of angle opposing the side you know)

AB = 19* (sin 75/ sin ( 180 -75-64) )

AB = 19 * ( sin 75 / sin 41) ≈ 27.9739...

4 0
3 years ago
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