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3 years ago

Please help! anyone........

Mathematics

1 answer:

larisa [96]3 years ago

7 0

Answer:

cf=f*points

Step-by-step explanation:

30*1=30

40*2=80

50*4=200

60*3=180

70*3=210

80*5=400

90*6=540

total=sum of all

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Samira used the calculator to find 254.3 × 2.5. Which statement best describes her work? Samira is correct. Samira is incorrect.

alekssr [168]

Answer:

A samira is correct

Step-by-step explanation:

Because she did her own expression right, now she has to solve

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2 years ago

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Solve the following equation for all values of x <br> 2x^2+18x-17=11x-2

Cerrena [4.2K]

2x^2 + 18x - 17 = 11x - 2

-11x +2 -11x +2

2x^2 +7x - 15 = 0

(x - 1.5) (x + 5)

x = 1.5 x = -5

3 0

3 years ago

What is the solution of 4x = 32 - x2?

nydimaria [60]

4x = 32 - 2x
Add -2x (or subtract 2x) from each side
2x = 32
Divide both sides by 2
x = 16

7 0

3 years ago

$#4 find the value of x. Round answer to nearest tenth please

Sonja [21]

Answer:

12.9

Step-by-step explanation:

sin 59 = opposite/hypotenuse

opposite is x, the dimension facing the angle 59

hypotenuse is the longest side = 15

sin 59 = x/15

x = 15sin59 = 15 x 0.8572 =12.858 = 12.9 in the nearest tenth

3 0

2 years ago

Please help, I need input on if I did this correctly and you just substitute.

kow [346]

The value of h(t) when $t=\frac{15}{32}$ is 10.02.

Solution:

Given function $h(t)=-16t^2+15t+6.5$

To find the value of h(t) when $t=\frac{15}{32}$ :

$h(t)=-16t^2+15t+6.5$

Substitute $t=\frac{15}{32}$ in the given function.

$$h\left(\frac{15}{32} \right)=-16\left(\frac{15}{32} \right)^2+15\left(\frac{15}{32} \right)+6.5$

$$=-16\left(\frac{225}{1024} \right)+15\left(\frac{15}{32} \right)+6.5$

Now multiply the common terms into inside the bracket.

$$=-\left(\frac{3600}{1024} \right)+\left(\frac{225}{32} \right)+6.5$

Now, in the first term, the numerator and denominator both have common factor 16. So reduce the first term into the lowest term.

$$=-\left(\frac{225}{64} \right)+\left(\frac{225}{32} \right)+6.5$

To make the denominator same, take LCM of the denominators.

LCM of 64 and 32 = 64

$$=-\left(\frac{225}{64} \right)+\left(\frac{225\times2}{32\times2} \right)+6.5\times\frac{64}{64}$

$$=-\frac{225}{64} +\frac{450}{64}+\frac{416}{64}$

$$=\frac{-225+450+416}{64}$

$$=\frac{641}{64}$

= 10.02

$$h\left(\frac{15}{32} \right)=10.02$

Hence the value of h(t) when $t=\frac{15}{32}$ is 10.02.

8 0

2 years ago