Please help me. I need to finish this!

Mathematics

1 answer:

kkurt [141]3 years ago

3 0

Answer:

3x + 19 = 10x - 23

7x = 42

X = 6

180 - (2×37) = 106

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A child got 16.67/20 on a test. what is their grade in percent form?

solong [7]

Answer:

83.4% or 83%

Step-by-step explanation:

when trying to find a percent, divide the numerator (# of correct answers) by the denominator (# of total questions possible to get correct)

Which would be 16.67 divided by 20 which equals .8335. Move the decimal point over two placements which would be 83.35. I rounded it up to 83.4. If trying to find a whole number not a decimal it would be 84%. Depending on the grading scale, it would be a B.

3 0

3 years ago

If you have $45 and they take 2.1% of it how much do you have left ?

IRINA_888 [86]

First you need to make a multiplier for 100-2.1%, to do this you minus the values and divide it by 100:
100-2.1 = 97.9
97.9/100 = 0.979

Then you multiply all the questions by it:
$45 * 0.979 = $44.055
$765 * 0.979 = $748.935
$1300 * 0.979 = $1272.7

Hope this helps! :)

3 0

3 years ago

determine whether each statement is always, sometimes, or never true. an absolute value function of the form f(x)=/x+a/+b has ex

Ksivusya [100]

Answer-

The statement that f(x) = |x+a| + b has exactly one x-intercept is sometimes correct.

Solution-

It solely depends on b, whether the function will have one or two or zero x intercept.

This plot of the given function, f(x) = |x+a| + b will be the basic absolute value graph i.e V shape, with vertex translated to (-a, b), instead of origin.

1- If b is zero, the graph will have exactly one x-intercept, at x= -a

2- If b is positive, the whole graph will be above the x-axis, hence it will have no x-intercepts.

3- If b is negative, the graph will be below the x-axis, hence it will have two x-intercepts.

∴ The statement is sometimes true.