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3 years ago

Help please with some 7th grade math

Mathematics

1 answer:

ivolga24 [154]3 years ago

6 0

ANSWER: 3 walls

EXPLANATION: Since we know that with 1/4 can he can paint 3/4 of a wall, and 4/4 is equal to one can of paint, all you would have to do is multiply 3/4 by 4 since 1/4 + 1/4 + 1/4 + 1/4 = 4/4 (Also can be written 4(1/4)=4/4)

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3) Which expression is equivalent to: 6(7-2) * O 67-62 O42-12 O 7-2 O 13 - 8

Vlad1618 [11]

Answer:

42-12

Step-by-step explanation:

Here you go mate

Step 1

6(7-2) Equation

Step 2

6(7-2) simplify

6x5

answer

42-12=30 check

4 0

3 years ago

What is the approximate area of the circle shown below?

Lynna [10]

Answer:

A. 2827 square cm

Step-by-step explanation:

Diameter of circle = 60 cm

Therefore, radius = 60/2 = 30 cm

$Area \: of \: circle \\ = \pi {r}^{2} \\ = 3.14159265\times {30}^{2} \\ = 3.14159265 \times 900 \\ = 2,827.43339 \: {cm}^{2} \\ = 2827 \: {cm}^{2}$

3 0

3 years ago

H=7 + 29t-16t^2 find all values of t for which the balls height is 19ft

NikAS [45]

$\bf \qquad \textit{initial velocity}\\\\
\begin{array}{llll}
\qquad \textit{in feet}\\\\
h(t) = -16t^2+v_ot+h_o
\end{array} 
\quad 
\begin{cases}
v_o=\textit{initial velocity of the object}\\
h_o=\textit{initial height of the object}\\
h=\textit{height of the object at "t" seconds}
\end{cases}\\\\
-------------------------------\\\\$

$\bf h(t)=7+29t-16t^2\qquad h(t)=19\implies 19=7+29t-16t^2
\\\\\\
16t^2-29t+12=0\impliedby \textit{now, let's use the quadratic formula}
\\\\\\
t=\cfrac{-(-29)\pm\sqrt{(-29)^2-4(16)(12)}}{2(16)}\implies t=\cfrac{29\pm\sqrt{841-768}}{32}
\\\\\\
t=\cfrac{29\pm\sqrt{73}}{32}\implies t\approx 
\begin{cases}
1.17\\
0.64
\end{cases}$

so hmm check the picture below, thus the ball hits 19 feet of height twice, once on the way up, and once on the way down, at about 0.64 seconds and at 1.17 seconds.

5 0

4 years ago

What is the measure of angle TRV? 20° 50° 60° 130°

kari74 [83]

130
srv is a straight line so angleSRV=180
TRV and SRT make up SRV so TRV + SRT = SRV.
(x-10) + (2x+10) = 180.
the 10s cancel each other out so 3x = 180
so x=60 bc 180/3=60. sub 60 for x in TRV and u get 130. sub 60 for x in SRT and you get 50, which, with 130 makes 180, so the answer is correct!

7 0

4 years ago

Read 2 more answers

Arnav was 1.5 m tall. In the last couple of years, his height has increased by 20%.

adell [148]

Answer:

He/she grew 0.3 meters so 1.8m

Step-by-step explanation:

I just did the math

4 0

4 years ago

Read 2 more answers